Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 48,128	$ 58,028
Trade and other accounts receivable, net of allowance for doubtful accounts of $12 and $0 as of March 31, 2019 and December 31, 2018, respectively	18,153	19,966
Inventories	36,886	33,645
Prepaid expenses and other current assets	2,575	2,817
Total current assets	105,742	114,456
Property and equipment, net	23,344	24,377
Operating lease right-of-use assets	8,683	0
Intangible assets, net	9,497	10,004
Goodwill	13,944	14,189
Other non-current assets	669	705
Total assets	161,879	163,731
Current liabilities:
Accounts payable and accrued liabilities	20,645	16,513
Accrued employee compensation	5,527	7,146
Deferred revenue and other current liabilities	4,580	4,279
Operating lease liability, short-term	2,178	0
Short-term borrowings and current portion of long-term debt	366	438
Total current liabilities	33,296	28,376
Deferred tax liability, long-term	50	53
Long-term debt, excluding current portion	38,305	37,969
Defined benefit plan liability	4,530	4,489
Operating lease liability, long-term	8,898	0
Other long-term liabilities	863	2,253
Total liabilities	85,942	73,140
Commitments and contingencies (Note 14)
Stockholders’ equity:
Common stock, $0.10 par value per share, 80,000,000 shares authorized at March 31, 2019 and December 31 2018; 46,501,538 and 45,996,186 shares issued and outstanding at March 31, 2019 and December 31, 2018, respectively	4,647	4,597
Additional paid-in capital	373,170	369,793
Accumulated deficit	(301,123)	(283,503)
Accumulated other comprehensive income	(757)	(296)
Total stockholders’ equity	75,937	90,591
Total liabilities and stockholders’ equity	$ 161,879	$ 163,731