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CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Cash flows from operating activities:    
Net income $ 1,504 $ 1,627
Adjustments to reconcile net income to net cash provided by (used in) operating activities    
Depreciation 406 365
Amortization of definite-lived intangible assets 235 629
Capitalized software amortization 536 612
Amortization of deferred financing costs 9 0
Change in fair value of contingent consideration 245 331
Stock-based compensation expense 678 569
Equity (gain) loss on investment in GSE-UNIS Simulation Technology Co. Ltd. (27) 22
Gain on derivative instruments (36) (49)
Changes in assets and liabilities:    
Contract receivables 884 (2,980)
Prepaid expenses and other assets 262 (1,359)
Accounts payable, accrued compensation and accrued expenses 609 (1,597)
Billings in excess of revenue earned (225) 656
Accrued warranty reserves (143) 401
Other liabilities 97 (844)
Net cash provided by (used in) operating activities 5,034 (1,617)
Cash flows from investing activities:    
Capital expenditures (1,404) (370)
Capitalized software development costs (914) (572)
Investment in GSE-UNIS Simulation Technology Co. Ltd. (469) (456)
Acquisitions, net of cash acquired 0 (830)
Restrictions of cash as collateral under letters of credit (1,734) (5,171)
Releases of cash as collateral under letters of credit 1,197 1,178
Drawdown of cash collateral on Emirates Simulation Academy, LLC line of credit 0 (79)
Net cash used in investing activities (3,324) (6,300)
Cash flows from financing activities:    
Proceeds from issuance of common stock 273 119
Payments of the liability-classified contingent consideration arrangements (845) 0
Treasury stock purchases (422) (1,127)
Net cash used in financing activities (994) (1,008)
Effect of exchange rate changes on cash 262 6
Net increase (decrease) in cash and cash equivalents 978 (8,919)
Cash and cash equivalents at beginning of year 20,326 26,577
Cash and cash equivalents at end of period $ 21,304 $ 17,658