CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities
Net income (loss)	$ 1,174	$ 2,801	$ (2,249)
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depreciation	562	497	579
Amortization of definite-lived intangible assets	313	948	102
Capitalized software amortization	704	813	978
Amortization of deferred financing costs	12	2	92
Change in fair value of contingent consideration	354	(322)	147
Stock-based compensation expense	914	727	883
Equity loss on investment in GSE-UNIS Simulation Technology Co. Ltd.	238	41	13
Loss on derivative instruments	121	68	913
Changes in assets and liabilities
Contract receivables	(3,331)	(2,099)	(903)
Prepaid expenses and other assets	1,379	(1,494)	(922)
Accounts payable, accrued compensation and accrued expenses	1,403	(855)	932
Billings in excess of revenue earned	792	856	1,669
Accrued warranty reserves	(193)	620	407
Other liabilities	(702)	(1,035)	(209)
Net cash provided by operating activities	3,740	1,568	2,432
Cash flows from investing activities
Capital expenditures	(1,551)	(520)	(519)
Capitalized software development costs	(1,315)	(838)	(903)
Investment in GSE-UNIS Simulation Technology Co. Ltd.	(469)	(456)	(587)
Acquisitions, net of cash acquired	0	(830)	(549)
Restrictions of cash as collateral under letters of credit	(1,777)	(5,668)	0
Release of cash as collateral under letters of credit	4,244	1,717	1,135
Drawdown of cash collateral on Emirates Simulation Academy, LLC line of credit	0	(78)	(294)
Proceeds from sale/leaseback transaction	0	0	377
Net cash used in investing activities	(868)	(6,673)	(1,340)
Cash flows from financing activities
Proceeds from issuance of common stock	272	143	176
Treasury stock purchases	(531)	(1,649)	0
Payments of the liability-classified contingent consideration arrangements	(845)	(167)	0
Release of cash for credit facility collateral	0	600	0
Deferred financing costs	0	(24)	(82)
Net cash provided by (used in) financing activities	(1,104)	(1,097)	94
Effect of exchange rate changes on cash	292	(49)	121
Net increase (decrease) in cash and cash equivalents	2,060	(6,251)	1,307
Cash and cash equivalents at beginning of year	20,326	26,577	25,270
Cash and cash equivalents at end of period	22,386	20,326	26,577
Non-cash financing activities
Issuance of 122,617 shares of common stock to acquire TAS Holdings Ltd.	$ 0	$ 0	$ 683