CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net revenues:
Revenue	$ 68,950	$ 45,691	$ 123,417	$ 100,423
Costs of sales:
Cost of sales	53,847	36,612	98,114	80,297
Gross margin	15,103	9,079	25,303	20,126
Operating expenses:
Selling, general and administrative	22,946	10,049	37,483	21,476
Research and development	8,643	4,538	14,452	9,403
Amortization of identifiable intangible assets	489	210	764	420
Gain on insurance proceeds	0	0	(4,400)	0
Operating expenses	32,078	14,797	48,299	31,299
Operating loss	(16,975)	(5,718)	(22,996)	(11,173)
Other expense – net	(341)	(139)	(392)	(764)
Loss on extinguishment of debt	0	0	0	(8,123)
Interest expense – net	(4,937)	(2,111)	(7,097)	(4,083)
Loss before provision for income taxes	(22,253)	(7,968)	(30,485)	(24,143)
Benefit from (provision for) income taxes	12,297	(1,008)	12,258	4,257
Net loss	$ (9,956)	$ (8,976)	$ (18,227)	$ (19,886)
Net loss per share, basic (in dollars per share)	$ (0.39)	$ (0.49)	$ (0.77)	$ (1.10)
Net loss per share, diluted (in dollars per share)	$ (0.39)	$ (0.49)	$ (0.77)	$ (1.10)
Weighted average shares outstanding, basic (in shares)	25,484	18,244	23,716	18,092
Weighted average shares outstanding, diluted (in shares)	25,484	18,244	23,716	18,092
Product
Net revenues:
Revenue	$ 23,939	$ 12,333	$ 42,495	$ 30,967
Costs of sales:
Cost of sales	18,487	9,982	33,372	24,887
Service
Net revenues:
Revenue	27,185	15,300	45,213	34,075
Costs of sales:
Cost of sales	18,940	9,912	31,635	22,558
Contract
Net revenues:
Revenue	17,826	18,058	35,709	35,381
Costs of sales:
Cost of sales	$ 16,420	$ 16,718	$ 33,107	$ 32,852