Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
ASSETS
Cash and cash equivalents	$ 6,527	$ 14,855
Short-term investment securities	29,979	18,456
Accounts receivable, net of allowance for doubtful accounts of $302 and $273 at September 30, 2017 and December 31, 2016, respectively	18,530	19,101
Inventories, net	12,828	14,442
Prepaid expenses and other assets	966	1,498
Current assets held for sale	0	50
Total current assets	68,830	68,402
Property and equipment, net	12,227	11,833
Goodwill	3,332	3,332
Intangible assets, net	2,403	3,275
Deferred tax assets, net	5,344	4,512
Other noncurrent assets	69	36
Non-current assets held for sale	0	776
TOTAL ASSETS	92,205	92,166
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable	5,185	6,073
Accrued liabilities	6,734	7,177
Total current liabilities	11,919	13,250
Other long-term liabilities	430	391
Total liabilities	12,349	13,641
Stockholders’ equity:
Common stock, $0.001 par value, 100,000,000 shares authorized, 17,762,694 and 17,335,122 shares issued and outstanding at September 30, 2017 and December 31, 2016, respectively	18	17
Additional paid-in capital	134,441	134,480
Accumulated deficit	(54,508)	(55,590)
Accumulated other comprehensive loss	(95)	(382)
Total stockholders’ equity	79,856	78,525
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 92,205	$ 92,166