Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
ASSETS
Cash and cash equivalents	$ 7,305	$ 7,055
Short-term investment securities	21,973	24,728
Accounts receivable, net of allowance for doubtful accounts of $264 and $314 at June 30, 2016 and December 31, 2015, respectively	18,191	21,001
Inventories, net	15,190	17,596
Prepaid expenses and other assets	1,448	1,586
Total current assets	64,107	71,966
Property and equipment, net	13,615	13,839
Goodwill	3,332	3,332
Intangible assets, net	5,141	11,378
Deferred tax assets, net	8,949	13,155
Other noncurrent assets	38	40
TOTAL ASSETS	95,182	113,710
LIABILITIES AND STOCKHOLDERS’ EQUITY
Accounts payable	4,719	6,735
Accrued liabilities	5,792	6,190
Total current liabilities	10,511	12,925
Other long-term liabilities	473	388
Total liabilities	10,984	13,313
Stockholders’ equity:
Common stock, $0.001 par value, 100,000,000 shares authorized, 17,324,506 and 17,654,236 shares issued and outstanding at June 30, 2016 and December 31, 2015, respectively	17	18
Additional paid-in capital	133,880	135,714
Accumulated deficit	(49,572)	(35,320)
Accumulated other comprehensive loss	(127)	(15)
Total stockholders’ equity	84,198	100,397
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 95,182	$ 113,710