Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 21,056	$ 11,376
Marketable securities	55,680	13,147
Accounts receivable, net of allowance for doubtful accounts of $1,268 and $1,597 as of December 31, 2022 & December 31, 2021, respectively	27,427	27,766
Inventories, net	22,730	15,833
Prepaid expenses and other current assets	3,067	2,637
Current contract assets	1,243	1,230
Current assets held for sale	0	15,841
Total current assets	131,203	87,830
Property and equipment, net	53,118	52,945
Intangible assets, net	404	1,287
Goodwill	5,308	6,570
Right of use assets	2,168	3,055
Other non-current assets	5,037	6,778
Non-current contract assets	3,033	3,104
Deferred income tax asset	259	56
Non-current assets held for sale	0	7,169
Total assets	200,530	168,794
Current liabilities:
Accounts payable	20,449	9,501
Accrued compensation and employee-related expenses	7,621	6,139
Accrued other	4,234	6,937
Accrued product warranty costs	1,287	1,084
Deferred revenue, current	3,108	3,778
Current operating lease liability	1,532	1,912
Liability for uncertain tax positions	637	592
Current liabilities held for sale	0	3,939
Total current liabilities	38,868	33,882
Other long-term liabilities	0	22
Long-term operating lease liability	636	1,224
Long-term contract liabilities	4,315	4,466
Deferred income tax liability	55	215
Non-current liabilities held for sale	0	8
Total liabilities	43,874	39,817
Commitments and contingencies (Notes 1, 5, 6, 14 and 15)
Stockholders’ equity:
Preferred stock, $0.01 par value. Authorized 1,000,000 shares; none issued	0	0
Common stock, $0.01 par value. Authorized 30,000,000 shares, 20,631,152 and 20,342,695 shares issued at December 31, 2022 and December 31, 2021, respectively; and 19,198,458 and 18,910,001 shares outstanding at December 31, 2022 and December 31, 2021, respectively	206	203
Additional paid-in capital	160,475	156,199
Retained earnings (accumulated deficit)	11,936	(12,165)
Accumulated other comprehensive loss	(4,110)	(3,409)
Total stockholders equity before treasury stock adjustment	168,507	140,828
Less: treasury stock at cost, 1,432,694 shares as of December 31, 2022 and December 31, 2021	(11,851)	(11,851)
Total stockholders’ equity	156,656	128,977
Total liabilities and stockholders’ equity	$ 200,530	$ 168,794