Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
CURRENT ASSETS:
Cash and cash equivalents	$ 7,327	$ 13,142
Accounts receivable - net of allowance for doubtful accounts of $87 and $187 at March 31, 2015 and December 31, 2014, respectively	3,798	3,491
Unbilled revenue	1,536	2,212
Inventories - net (Note 4)	18,987	16,456
Deferred costs	1,062	1,062
Prepaid expenses and other current assets	1,723	2,737
Total current assets	34,433	39,100
Property, plant and equipment - net (Note 5)	1,908	1,854
Intangible assets - net (Note 6)	605	474
Goodwill	722	722
Deferred income taxes (Note 12)	543	487
Other assets		217
Total Assets	38,211	42,854
CURRENT LIABILITIES:
Working capital revolving line of credit	4,000	4,000
Accounts payable	2,957	4,153
Accrued expenses (Note 8)	4,639	5,050
Accrued compensation	2,735	2,529
Deferred revenue	2,667	4,275
Deferred income taxes (Note 12)	708	649
Customer deposits	7,769	5,642
Other current liabilities	105	77
Total current liabilities	25,580	26,375
Deferred revenue, less current portion	2,142	2,041
Other long-term liability	343	308
Total Liabilities	28,065	28,724
Commitments and Contingencies (Note 16)
SHAREHOLDERS' EQUITY:
Accumulated other comprehensive income (loss)	(32)
Additional paid-in capital	8,150	7,972
Accumulated deficit	(163,361)	(159,228)
Total Shareholders' Equity	10,146	14,130
Total Liabilities and Shareholders' Equity	38,211	42,854
Voting Common Shares-No Par, Unlimited Shares Authorized [Member]
SHAREHOLDERS' EQUITY:
Common stock	$ 165,389	$ 165,386