Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 14,259	$ 18,050
Marketable securities	25	25
Accounts receivable, net of allowance for doubtful accounts of $2,555 and $2,685 as of March 31, 2019 and December 31, 2018, respectively	28,832	29,663
Inventories	26,062	22,942
Prepaid expenses and other current assets	4,320	3,494
Current contract assets	3,678	3,566
Total current assets	77,176	77,740
Property and equipment, net	53,697	53,248
Intangible assets, net	9,807	10,518
Goodwill	32,845	32,213
Right of use asset operating lease	9,411
Other non-current assets	7,021	6,736
Non-current contract assets	7,342	6,971
Non-current deferred income tax asset	210	226
Total assets	197,509	187,652
Current liabilities:
Accounts payable	20,270	17,726
Accrued compensation and employee-related expenses	4,249	5,167
Accrued other	10,131	10,964
Accrued product warranty costs	2,021	1,916
Current portion of long-term debt	10,585	9,928
Contract liabilities	12,211	9,193
Current operating lease liability	4,749
Liability for uncertain tax positions	1,141	1,116
Total current liabilities	65,357	56,010
Other long-term liabilities	1,752	1,920
Long-term operating lease liability	4,672
Long-term contract liabilities	9,634	9,070
Long-term debt, excluding current portion	18,749	19,437
Non-current deferred income tax liability	1,747	1,700
Total liabilities	101,911	88,137
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; 19,134,469 and 19,026,393 shares issued at March 31, 2019 and December 31, 2018, respectively; and 17,852,047 and 17,743,971 shares outstanding at March 31, 2019 and December 31, 2018, respectively	191	190
Additional paid-in capital	140,790	139,617
Accumulated deficit	(21,576)	(15,397)
Accumulated other comprehensive loss	(13,643)	(14,731)
Stockholders equity before treasury stock adjustment	105,762	109,679
Less: treasury stock at cost, common stock, 1,282,422 and 1,282,422 shares as of March 31, 2019 and December 31, 2018, respectively	(10,164)	(10,164)
Total stockholders’ equity	95,598	99,515
Total liabilities and stockholders’ equity	$ 197,509	$ 187,652