Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	[1]
Current assets:
Cash and cash equivalents	$ 22,751	$ 23,747
Accounts receivable, net of allowance for doubtful accounts of $226 as of September 30, 2017 and $230 as of December 31, 2016	7,390	10,025
Inventories	10,669	11,643
Prepaid expenses and other current assets	671	450
Total current assets	41,481	45,865
Property and equipment, net	1,428	1,534
Intangible assets, net	120	132
Goodwill	533	533
Other long-term assets	48	80
Total assets	43,610	48,144
Current liabilities:
Accounts payable	1,864	1,994
Accrued compensation	2,338	2,346
Accrued expenses	1,680	2,135
Accrued warranty	427	310
Deferred revenue	1,403	1,383
Total current liabilities	7,712	8,168
Long-term liabilities:
Accrued warranty	255	293
Other long-term liabilities	541	523
Total liabilities	8,508	8,984
Stockholders’ equity:
Preferred stock, $0.01 par value, 2,000,000 shares authorized, no shares issued and outstanding
Common stock, $0.01 par value: Authorized: 30,000,000 shares; Issued and outstanding 11,579,379 and 11,304,736 shares as of September 30, 2017 and December 31, 2016, respectively	126	124
Additional paid-in capital	58,810	55,158
Accumulated deficit	(23,834)	(16,122)
Total stockholders’ equity	35,102	39,160
Total liabilities and stockholders’ equity	$ 43,610	$ 48,144

[1] Derived from the audited consolidated financial statements included in the Annual Report on Form 10-K filed with the SEC for the year ended December 31, 2016.