Consolidated Balance sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 2,543	$ 3,307
Accounts receivable, less allowance of $304 and $289 in 2012 and 2011, respectively	11,680	8,899
Inventory, net	11,142	11,312
Prepaid expenses and other current assets	1,552	1,808
Total current assets	26,917	25,326
Property, plant and equipment, net	1,509	1,148
Intangible assets, net	300	212
Goodwill	2,926	2,926
Deferred tax asset	16	8
Other assets	305	187
Total assets	31,973	29,807
Current liabilities:
Lines of credit	1,637
Accounts payable	7,663	7,804
Accrued liabilities	6,267	6,177
Customer deposits	582	165
Deferred revenue, current portion	3,226	2,136
Total current liabilities	19,375	16,282
Deferred tax liabilities	663	594
Deferred revenue, long-term	3	25
Other liabilities, long-term	138	337
Total liabilities	20,179	17,238
Commitments and contingencies (Notes 5 and 7)
Stockholders' equity (deficit):
Preferred stock, par value $0.001; 1,000 shares authorized, no shares issued and outstanding
Common stock, par value $0.001; 50,000 shares authorized, 33,248 and 32,502 shares issued in 2012 and 2011, respectively; 31,284 shares and 30,538 shares outstanding in 2012 and 2011, respectively	34	33
Additional paid-in capital	140,747	138,507
Accumulated other comprehensive loss	(320)	(360)
Accumulated deficit	(112,268)	(109,212)
Stockholders' equity excluding treasury stock	28,193	28,968
Treasury stock (cost of 1,964 shares repurchased)	(16,399)	(16,399)
Total stockholders' equity	11,794	12,569
Total liabilities and stockholders' equity	$ 31,973	$ 29,807