Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income (loss)	$ 2,111	$ (622)	$ 3,240	$ (4,692)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation	55	57	107	114
Stock-based compensation			284	258
Provision for doubtful accounts receivable			60	(3)
Amortization of intangible assets			0	27
Amortization of discounts on long-term borrowings and acquisition related liabilities			0	2,815
Amortization of loan origination fees			23	83
Changes in operating assets and liabilities:
Trade accounts receivable, inventories, and other assets			(2,106)	(457)
Accounts payable, accrued liabilities, accrued federal and state income taxes, and accrued warranty reserve			(1,227)	(428)
Deferred revenue			43	(630)
Total adjustments			(2,816)	1,779
Net cash provided by (used in) operating activities			424	(2,913)
Cash flows from investing activities:
Acquisitions of property and equipment			(360)	(107)
Proceeds from the sale of property and equipment			0	130
Net cash (used in) provided by investing activities			(360)	23
Cash flows from financing activities:
Proceeds from warrants exercised			2,503	0
Proceeds from issuances of common stock, net			0	806
Proceeds from exercises of stock options and employee stock purchase plan purchases			83	27
Payments on other borrowings			0	(29)
Net proceeds on credit line borrowings			2	824
Net cash provided by financing activities			2,588	1,628
Effect of exchange rate changes on cash			(10)	(2)
Net increase (decrease) in cash and cash equivalents			2,642	(1,264)
Cash and cash equivalents, beginning of period			7,531	2,860
Cash and cash equivalents, end of period	10,173	1,596	10,173	1,596
Classification of cash and cash equivalents:
Cash and cash equivalents	9,737	1,122
Restricted cash held	136	174
Cash held in escrow	300	300
Cash and cash equivalents, end of period	$ 10,173	$ 1,596	7,531	2,860
Supplemental disclosures for non-cash financing activities:
Conversion of subordinated convertible debt to equity, net of discount amortization			$ 0	$ 3,858