Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 10,173	$ 7,531
Trade accounts receivable less allowances of $200 and $323, respectively	2,506	3,113
Inventories, net	9,847	7,283
Prepaid and other current assets	1,084	1,002
Total current assets	23,610	18,929
Property and equipment, net	732	479
Other assets	111	88
Total assets	24,453	19,496
Current liabilities:
Accounts payable	4,911	7,601
Accrued liabilities	1,462	1,209
Accrued federal and state income taxes	923	0
Accrued warranty reserve	471	188
Deferred revenue	200	133
Billings in excess of costs and estimated earnings on uncompleted contracts	0	23
Credit line borrowings	455	453
Total current liabilities	8,422	9,607
Other liabilities	87	46
Long-term debt	70	70
Total liabilities	8,579	9,723
STOCKHOLDERS' EQUITY
Preferred stock, par value $0.0001 per share: Authorized: 2,000,000 shares in 2015 and 2014, Issued and outstanding: no shares in 2015 and 2014	0	0
Common stock, par value $0.0001 per share: Authorized: 15,000,000 shares in 2015 and 2014. Issued and outstanding: 10,025,790 at June 30, 2015 and 9,423,975 at December 31, 2014	1	1
Additional paid-in capital	101,003	98,133
Accumulated other comprehensive income	460	469
Accumulated deficit	(85,590)	(88,830)
Total stockholders' equity	15,874	9,773
Total liabilities and stockholders' equity	$ 24,453	$ 19,496