Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net revenue:
Net revenue	$ 68,070	$ 57,535	$ 108,883	$ 79,114
Cost of revenue:
Total cost of revenue	62,994	46,914	108,278	72,277
Gross profit	5,076	10,621	605	6,837
Operating expenses:
Research and development	9,757	8,933	20,169	16,306
Selling, general and administrative	21,658	13,627	32,671	22,951
Total operating expenses	31,415	22,560	52,840	39,257
Operating loss	(26,339)	(11,939)	(52,235)	(32,420)
Interest and other expense, net	(13,198)	(7,861)	(24,781)	(16,206)
Change in fair value of common stock warrant liability		1,706		(420)
Gain on extinguishment of debt	13,222		13,222
Loss before income taxes	(26,315)	(18,094)	(63,794)	(49,046)
Income tax benefit	17,659		17,659
Net loss attributable to the Company	(8,656)	(18,094)	(46,135)	(49,046)
Preferred stock dividends declared and accretion of discount	(13)	(13)	(19)	(26)
Net loss attributable to common stockholders	$ (8,669)	$ (18,107)	$ (46,154)	$ (49,072)
Net loss per share:
Basic and diluted	$ (0.03)	$ (0.08)	$ (0.15)	$ (0.22)
Weighted average number of common stock outstanding	316,645,050	231,114,868	310,918,626	225,899,224
Sales of fuel cell systems and related infrastructure
Net revenue:
Net revenue	$ 47,746	$ 38,696	$ 68,133	$ 41,240
Cost of revenue:
Total cost of revenue	33,676	23,129	47,420	25,450
Services performed on fuel cell systems and related infrastructure
Net revenue:
Net revenue	6,236	5,341	12,757	11,684
Cost of revenue:
Total cost of revenue	6,491	6,218	14,672	12,341
Power Purchase Agreements
Net revenue:
Net revenue	6,654	6,409	13,150	12,519
Cost of revenue:
Total cost of revenue	13,704	8,713	27,947	17,711
Fuel delivered to customers
Net revenue:
Net revenue	7,372	7,089	14,705	13,671
Cost of revenue:
Total cost of revenue	9,060	$ 8,854	18,095	$ 16,775
Other
Net revenue:
Net revenue	62		138
Cost of revenue:
Total cost of revenue	$ 63		$ 144