CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues, net:
Revenue	$ 80,285,000	$ 54,467,000
Costs of sales:
Cost of sales	59,672,000	44,267,000
Gross margin	20,613,000	10,200,000
Operating expenses:
Selling, general and administrative	22,368,000	14,537,000
Research and development	10,841,000	5,809,000
Amortization of identifiable intangible assets	213,000	275,000
Gain on insurance proceeds	0	(4,400,000)
Operating expenses	33,422,000	16,221,000
Operating loss	(12,809,000)	(6,021,000)
Other expense, net	(368,000)	(51,000)
Interest expense, net	(2,463,000)	(2,160,000)
Loss before provision for income taxes	(15,640,000)	(8,232,000)
Provision for income taxes	(10,000)	(39,000)
Net loss	$ (15,650,000)	$ (8,271,000)
Net loss per share, basic (in dollars per share)	$ (0.58)	$ (0.38)
Net loss per share, diluted (in dollars per share)	$ (0.58)	$ (0.38)
Weighted average shares outstanding, basic (in shares)	26,970	21,929
Weighted average shares outstanding, diluted (in shares)	26,970	21,929
Product
Revenues, net:
Revenue	$ 25,073,000	$ 18,556,000
Costs of sales:
Cost of sales	19,997,000	14,885,000
Service
Revenues, net:
Revenue	33,773,000	18,028,000
Costs of sales:
Cost of sales	19,796,000	12,695,000
Contract
Revenues, net:
Revenue	21,439,000	17,883,000
Costs of sales:
Cost of sales	$ 19,879,000	$ 16,687,000