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Unaudited Quarterly Financial data and Restatement of Previously Issued Unaudited Interim Condensed Consolidated Financial Statements (Tables) | 12 Months Ended
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Dec. 31, 2020
Unaudited Quarterly Financial data and Restatement of Previously Issued Unaudited Interim Condensed Consolidated Financial Statements |
Schedule of Quarterly Financial Information | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Quarters ended |
​ | ​ | As Restated | ​ | ​ | ​ | ​
​ |  | March 31, |  | June 30, |  | September 30, |  | December 31, |
​ | ​ | 2020 | ​ | 2020 | ​ | 2020 | ​ | 2020 |
Net revenue: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
Sales of fuel cell systems and related infrastructure | ​ | $ | 20,468 | ​ | $ | 47,746 | ​ | $ | 83,662 | ​ | $ | (246,171) | ​
Services performed on fuel cell systems and related infrastructure | ​ |  | 6,521 | ​ |  | 6,236 | ​ |  | 6,829 | ​ |  | (29,387) | ​
Power Purchase Agreements | ​ |  | 6,421 | ​ |  | 6,579 | ​ |  | 6,629 | ​ |  | 6,991 | ​
Fuel delivered to customers | ​ |  | 7,333 | ​ |  | 7,372 | ​ |  | 9,831 | ​ |  | (40,608) | ​
Other | ​ | ​ | 76 | ​ | ​ | 62 | ​ | ​ | 97 | ​ | ​ | 76 | ​
Net revenue | ​ | ​ | 40,819 | ​ | ​ | 67,995 | ​ | ​ | 107,048 | ​ | ​ | (309,099) | ​
Gross loss | ​ |  | (9,703) | ​ |  | (15) | ​ |  | (28,584) | ​ |  | (431,114) | ​
Operating expenses | ​ | ​ | 15,883 | ​ | ​ | 26,517 | ​ | ​ | 25,726 | ​ | ​ | 46,660 | ​
Operating loss | ​ |  | (25,586) | ​ |  | (26,532) | ​ |  | (54,310) | ​ |  | (477,774) | ​
Net loss attributable to common stockholders | ​ | ​ | (37,445) | ​ | ​ | (9,414) | ​ | ​ | (65,217) | ​ | ​ | (484,105) | ​
Loss per share: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic and Diluted | ​ | $ | (0.12) | ​ | $ | (0.03) | ​ | $ | (0.18) | ​ | $ | (1.35) | ​
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Quarters ended |
​ | ​ | As Restated | ​
​ |  | March 31, |  | June 30, |  | September 30, |  | December 31, |
​ | ​ | 2019 | ​ | 2019 | ​ | 2019 | ​ | 2019 |
Net revenue: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
Sales of fuel cell systems and related infrastructure | ​ | $ | 2,550 | ​ | $ | 38,702 | ​ | $ | 38,883 | ​ | $ | 69,785 | ​
Services performed on fuel cell systems and related infrastructure | ​ |  | 6,343 | ​ |  | 5,341 | ​ |  | 6,205 | ​ |  | 7,328 | ​
Power Purchase Agreements | ​ |  | 6,035 | ​ |  | 6,334 | ​ |  | 6,520 | ​ |  | 6,664 | ​
Fuel delivered to customers | ​ |  | 6,582 | ​ |  | 7,089 | ​ |  | 7,649 | ​ |  | 7,779 | ​
Other | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 135 | ​ | ​ | 51 | ​
Net revenue | ​ | ​ | 21,510 | ​ | ​ | 57,466 | ​ | ​ | 59,392 | ​ | ​ | 91,607 | ​
Gross (loss) profit | ​ |  | (7,740) | ​ |  | 6,142 | ​ |  | 4,500 | ​ |  | 7,746 | ​
Operating expenses | ​ | ​ | 12,227 | ​ | ​ | 17,221 | ​ | ​ | 13,958 | ​ | ​ | 14,855 | ​
Operating loss | ​ |  | (19,967) | ​ |  | (11,079) | ​ |  | (9,458) | ​ |  | (7,109) | ​
Net loss attributable to common stockholders | ​ | ​ | (30,560) | ​ | ​ | (17,351) | ​ | ​ | (18,366) | ​ | ​ | (19,277) | ​
Loss per share: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic and Diluted | ​ | $ | (0.14) | ​ | $ | (0.08) | ​ | $ | (0.08) | ​ | $ | (0.07) | ​

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121640914&loc=d3e1280-108306 + Details
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