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CONSOLIDATED STATEMENTS OF CASH FLOW (USD $)
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income (loss) $ 15,079 $ (707,749)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization 275,684 283,667
Noncash stock-based compensation expense 23,218 65,283
Amortization of debt discount 0 2,500
Changes in assets and liabilities:    
Decrease in accounts receivable 1,061,605 930,084
Increase in inventory (9,034) (47,778)
Increase in other current assets (22,497) (58,226)
Increase in accounts payable and accrued expenses 26,093 97,618
Decrease in deferred revenue (305,993) (348,111)
(Decrease) increase in deferred rent (1,434) 23,806
Net cash provided by operating activities 1,062,721 241,094
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchases of property and equipment (28,591) (13,924)
Net cash used in investing activities (28,591) (13,924)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Net proceeds from issuance of common stock from exercise of stock options 0 27,600
Net cash provided by financing activities 0 27,600
Increase in cash and cash equivalents 1,034,130 254,770
CASH AND CASH EQUIVALENTS, beginning of period 1,394,148 1,488,904
CASH AND CASH EQUIVALENTS, end of period 2,428,278 1,743,674
SUPPLEMENTAL CASH FLOW INFORMATION    
Income taxes 6,000 0
Interest $ 0 $ 0