CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net loss	$ (1,155)	$ 530
Adjustments to reconcile net income (loss) to net cash used in operating activities
Depreciation	153	137
Amortization of definite-lived intangible assets	52	78
Capitalized software amortization	176	200
Amortization of deferred financing costs	3	3
Change in fair value of contingent consideration	86	45
Stock-based compensation expense	224	220
Equity (gain) loss on investment in GSE-UNIS Simulation Technology Co. Ltd.	114	(62)
Gain on derivative instruments	(267)	(400)
Changes in assets and liabilities:
Contract receivables	543	(2,486)
Prepaid expenses and other assets	27	92
Accounts payable, accrued compensation and accrued expenses	(296)	(1,032)
Billings in excess of revenue earned	(1,519)	297
Accrued warranty reserves	(119)	196
Other liabilities	(105)	(290)
Net cash used in operating activities	(2,083)	(2,472)
Cash flows from investing activities:
Capital expenditures	(131)	(350)
Capitalized software development costs	(497)	(269)
Investment in GSE-UNIS Simulation Technology Co. Ltd.	0	(469)
Restrictions of cash as collateral under letters of credit	0	(2)
Releases of cash as collateral under letters of credit	0	305
Net cash used in investing activities	(628)	(785)
Cash flows from financing activities:
Proceeds from issuance of common stock	37	210
Payments of the liability-classified contingent consideration arrangements	(979)	0
Treasury stock purchases	(2)	(303)
Net cash used in financing activities	(944)	(93)
Effect of exchange rate changes on cash	(23)	209
Net decrease in cash and cash equivalents	(3,678)	(3,141)
Cash and cash equivalents at beginning of year	22,386	20,326
Cash and cash equivalents at end of period	$ 18,708	$ 17,185