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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Cash flows from operating activities:    
Net income $ 493,288 $ 236,665
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 306,928 268,341
Bad debt expense 35,228 76,937
Deferred income taxes 56,015 (209,777)
Stock-based compensation expense 167,078 131,844
Non-cash interest expense 0 208,335
Changes in operating assets and liabilities:    
Decrease (increase) in accounts receivable (257,614) 292,362
Decrease (increase) in deposits and prepaid assets (32,324) (68,747)
Increase (decrease) in accounts payable 167,617 130,102
Increase (decrease) in accrued expenses (484,962) 87,081
Increase (decrease) in deferred revenue 50,063 (74,111)
Net cash provided by operating activities 501,317 1,079,032
Cash flows from investing activities:    
Capitalized software (347,364) 0
Purchase of fixed assets (30,628) (22,344)
Net cash used in investing activities (377,992) (22,344)
Cash flows from financing activities:    
Proceeds from exercise of stock options, net of income taxes 7,094 0
Payment of dividend (83,551) 0
Net cash used in financing activities (76,457) 0
Net change in cash 46,868 1,056,688
Cash - beginning 4,215,145 1,721,343
Currency translation adjustment 14,713 (2,773)
Cash - ending 4,276,726 2,775,258
Supplemental disclosures:    
Cash paid for interest 0 19,906
Cash paid for income taxes 120,250 34,500
Non-cash activities:    
Stock-based compensation - capitalized software $ 179,200 $ 0