CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues, net:
Revenue	$ 85,093,000	$ 68,950,000	$ 165,378,000	$ 123,417,000
Costs of sales:
Cost of sales	63,972,000	53,847,000	123,644,000	98,114,000
Gross margin	21,121,000	15,103,000	41,734,000	25,303,000
Operating expenses:
Selling, general and administrative	26,398,000	22,946,000	48,766,000	37,483,000
Research and development	10,101,000	8,643,000	20,942,000	14,452,000
Amortization of identifiable intangible assets	721,000	489,000	934,000	764,000
Gain on insurance proceeds	0	0	0	(4,400,000)
Total operating expenses	37,220,000	32,078,000	70,642,000	48,299,000
Operating loss	(16,099,000)	(16,975,000)	(28,908,000)	(22,996,000)
Other expense, net	(257,000)	(341,000)	(625,000)	(392,000)
Interest expense, net	(2,451,000)	(4,937,000)	(4,914,000)	(7,097,000)
Loss before provision for income taxes	(18,807,000)	(22,253,000)	(34,447,000)	(30,485,000)
(Provision for) benefit from income taxes	(41,000)	12,297,000	(51,000)	12,258,000
Net loss	$ (18,848,000)	$ (9,956,000)	$ (34,498,000)	$ (18,227,000)
Net loss per share, basic (in dollars per share)	$ (0.70)	$ (0.39)	$ (1.27)	$ (0.77)
Net loss per share, diluted (in dollars per share)	$ (0.70)	$ (0.39)	$ (1.27)	$ (0.77)
Weighted average shares outstanding, basic (in shares)	26,982	25,484	27,070	23,716
Weighted average shares outstanding, diluted (in shares)	26,982	25,484	27,070	23,716
Product
Revenues, net:
Revenue	$ 28,390,000	$ 23,939,000	$ 53,477,000	$ 42,495,000
Costs of sales:
Cost of sales	24,211,000	18,487,000	44,208,000	33,372,000
Service
Revenues, net:
Revenue	35,781,000	27,185,000	69,540,000	45,213,000
Costs of sales:
Cost of sales	21,164,000	18,940,000	40,960,000	31,635,000
Contract
Revenues, net:
Revenue	20,922,000	17,826,000	42,361,000	35,709,000
Costs of sales:
Cost of sales	$ 18,597,000	$ 16,420,000	$ 38,476,000	$ 33,107,000