| USD ($) $ in Thousands, shares in Millions | Jun 30, 2026 | Mar 31, 2026 | Sep 30, 2025 | Jun 30, 2025 | Mar 31, 2025 | Sep 30, 2024 | Jun 30, 2024 | Mar 31, 2024 | Sep 30, 2023 | Jun 30, 2023 | Mar 31, 2023 | Sep 30, 2022 | Jun 30, 2022 | Mar 31, 2022 | Sep 30, 2021 | Jun 30, 2021 | Mar 31, 2021 | Sep 30, 2020 | Jun 30, 2020 | Mar 31, 2020 | Sep 30, 2019 | Jun 30, 2019 | Mar 31, 2019 | Sep 30, 2018 | Jun 30, 2018 | Mar 31, 2018 | Sep 30, 2017 | Jun 30, 2017 | Mar 31, 2017 | Sep 30, 2016 | Jun 30, 2016 | Mar 31, 2016 | Sep 30, 2015 | Jun 30, 2015 | Mar 31, 2015 | Sep 30, 2014 | Jun 30, 2014 | Mar 31, 2014 | Sep 30, 2013 | Jun 30, 2013 | Mar 31, 2013 | Sep 30, 2012 | Jun 30, 2012 | Mar 31, 2012 | Sep 30, 2011 | Jun 30, 2011 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Revenues | ||||||||||||||||||||||||||||||||||||||||||||||
Total revenues | $ 28,236,000 | $ 22,387,000 | $ 28,095,000 | $ 22,496,000 | $ 19,335,000 | $ 25,182,000 | $ 25,500,000 | $ 21,301,000 | $ 23,350,000 | $ 24,927,000 | $ 23,329,000 | $ 21,454,000 | ||||||||||||||||||||||||||||||||||
Automotive sales | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||||||||||||||
Automotive leasing | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||||||||||||||
Total automotive revenues | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||||||||||||||
Energy generation and storage | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||||||||||||||
Services and other | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||||||||||||||
Development services | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||||||||||||||
Cost of revenues | ||||||||||||||||||||||||||||||||||||||||||||||
Automotive sales | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||||||||||||||
Automotive leasing | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||||||||||||||
Total automotive cost of revenues | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||||||||||||||
Energy generation and storage | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||||||||||||||
Services and other | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||||||||||||||
Development services | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||||||||||||||
Total cost of revenues | 23,485,000 | 17,667,000 | 23,041,000 | 18,618,000 | 16,182,000 | 20,185,000 | 20,922,000 | 17,605,000 | 19,172,000 | 20,394,000 | 18,818,000 | 16,072,000 | ||||||||||||||||||||||||||||||||||
Gross profit | 4,751,000 | 4,720,000 | 5,054,000 | 3,878,000 | 3,153,000 | 4,997,000 | 4,578,000 | 3,696,000 | 4,178,000 | 4,533,000 | 4,511,000 | 5,382,000 | ||||||||||||||||||||||||||||||||||
Operating expenses | ||||||||||||||||||||||||||||||||||||||||||||||
Research and development | 2,371,000 | 1,946,000 | 1,630,000 | 1,589,000 | 1,409,000 | 1,039,000 | 1,074,000 | 1,151,000 | 1,161,000 | 943,000 | 771,000 | 733,000 | ||||||||||||||||||||||||||||||||||
Selling, general and administrative | 1,982,000 | 1,833,000 | 1,562,000 | 1,366,000 | 1,251,000 | 1,186,000 | 1,277,000 | 1,374,000 | 1,253,000 | 1,191,000 | 1,076,000 | 961,000 | ||||||||||||||||||||||||||||||||||
Restructuring and other | 0 | 0 | 238,000 | 0 | 94,000 | 55,000 | 622,000 | - | 0 | 0 | - | 0 | ||||||||||||||||||||||||||||||||||
Total operating expenses | 4,353,000 | 3,779,000 | 3,430,000 | 2,955,000 | 2,754,000 | 2,280,000 | 2,973,000 | 2,525,000 | 2,414,000 | 2,134,000 | 1,847,000 | 1,694,000 | ||||||||||||||||||||||||||||||||||
Income from operations | 398,000 | 941,000 | 1,624,000 | 923,000 | 399,000 | 2,717,000 | 1,605,000 | 1,171,000 | 1,764,000 | 2,399,000 | 2,664,000 | 3,688,000 | ||||||||||||||||||||||||||||||||||
Interest income | 422,000 | 434,000 | 439,000 | 392,000 | 400,000 | 429,000 | 348,000 | 350,000 | 282,000 | 238,000 | 213,000 | 86,000 | ||||||||||||||||||||||||||||||||||
Interest expense | (81,000) | (92,000) | (76,000) | (86,000) | (91,000) | (92,000) | (86,000) | (76,000) | (38,000) | (28,000) | (29,000) | (53,000) | ||||||||||||||||||||||||||||||||||
Other income, net | 590,000 | (535,000) | (28,000) | 320,000 | (119,000) | (270,000) | 20,000 | 108,000 | 37,000 | 328,000 | (48,000) | (85,000) | ||||||||||||||||||||||||||||||||||
Income before income taxes | 1,329,000 | 748,000 | 1,959,000 | 1,549,000 | 589,000 | 2,784,000 | 1,887,000 | 1,553,000 | 2,045,000 | 2,937,000 | 2,800,000 | 3,636,000 | ||||||||||||||||||||||||||||||||||
Provision for income taxes | 201,000 | 257,000 | 570,000 | 359,000 | 169,000 | 601,000 | 393,000 | 409,000 | 167,000 | 323,000 | 261,000 | 305,000 | ||||||||||||||||||||||||||||||||||
Net income | 1,128,000 | 491,000 | 1,389,000 | 1,190,000 | 420,000 | 2,183,000 | 1,494,000 | 1,144,000 | 1,878,000 | 2,614,000 | 2,539,000 | 3,331,000 | ||||||||||||||||||||||||||||||||||
Net income attributable to noncontrolling interests and redeemable noncontrolling interests in subsidiaries | 14,000 | 14,000 | 16,000 | 18,000 | 11,000 | 16,000 | 16,000 | 15,000 | 25,000 | (89,000) | 26,000 | 39,000 | ||||||||||||||||||||||||||||||||||
Net income attributable to common stockholders | 1,114,000 | 477,000 | 1,373,000 | 1,172,000 | 409,000 | 2,167,000 | 1,478,000 | 1,129,000 | 1,853,000 | 2,703,000 | 2,513,000 | 3,292,000 | ||||||||||||||||||||||||||||||||||
Less: Buy-out of noncontrolling interest | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||||||||||||||
Net income used in computing net income per share of common stock | - | - | - | - | - | - | - | - | - | - | - | - | ||||||||||||||||||||||||||||||||||
Net income per share of common stock attributable to common stockholders | ||||||||||||||||||||||||||||||||||||||||||||||
Basic (in dollars per share) | $ 0.34 | $ 0.15 | $ 0.43 | $ 0.36 | $ 0.13 | $ 0.68 | $ 0.46 | $ 0.37 | $ 0.58 | $ 0.85 | $ 0.8 | $ 1.05 | ||||||||||||||||||||||||||||||||||
Diluted (in dollars per share) | $ 0.32 | $ 0.13 | $ 0.39 | $ 0.33 | $ 0.12 | $ 0.62 | $ 0.42 | $ 0.34 | $ 0.53 | $ 0.78 | $ 0.73 | $ 0.95 | ||||||||||||||||||||||||||||||||||
Weighted average shares used in computing net income per share of common stock | ||||||||||||||||||||||||||||||||||||||||||||||
Basic (in shares) | 3,237 | 3,234 | 3,227 | 3,223 | 3,218 | 3,198 | 3,191 | 3,186 | 3,176 | 3,171 | 3,166 | 3,146 | ||||||||||||||||||||||||||||||||||
Diluted (in shares) | 3,540 | 3,538 | 3,526 | 3,519 | 3,521 | 3,497 | 3,481 | 3,484 | 3,493 | 3,478 | 3,468 | 3,468 |