CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 3,795	$ 5,507
Accounts receivable, net	11,643	10,948
Inventories, net	13,065	8,875
Prepaid income taxes	47	514
Other current assets	520	517
Total current assets	29,070	26,361
Fixed assets, net of accumulated depreciation of $20,319 and $19,752, respectively	2,264	2,169
Goodwill	2,621	2,621
Deferred tax assets	2,263	2,308
Intangible assets, net of accumulated amortization of $3,454, and $3,359, respectively	829	458
Other assets	31	33
Total noncurrent assets	8,008	7,589
Total assets	37,078	33,950
Current liabilities:
Accounts payable	6,359	3,841
Accrued liabilities	2,706	3,339
Deferred revenue	307	169
Total current liabilities	9,372	7,349
Deferred revenue, net of current portion	253	69
Deferred rent, net of current portion	260	271
Other liabilities	228	247
Total noncurrent liabilities	741	587
Total liabilities	10,113	7,936
Shareholders' equity:
Common stock, $0.01 par value, 20,000,000 shares authorized; 11,435,870 and 11,366,526 shares issued, respectively; 7,391,028 and 7,478,094 shares outstanding, respectively	114	114
Additional paid-in capital	31,841	31,353
Retained earnings	27,219	24,756
Accumulated other comprehensive loss, net of tax	(99)	(99)
Treasury stock, at cost, 4,044,842 and 3,888,432 shares	(32,110)	(30,110)
Total shareholders' equity	26,965	26,014
Total liabilities and shareholders' equity	$ 37,078	$ 33,950