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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Cash flows from operating activities:    
Net income $ 2,420,487 $ 2,407,996
Adjustments to reconcile net income to net cash provided by operating activities:    
Stock-based compensation 137,213 129,893
Provision for bad debts 278,900 267,370
Depreciation and amortization 564,695 514,049
Amortization of loan fees 150,133 93,890
Deferred income taxes 957,399 1,559,791
Change in operating assets and liabilities:    
Accounts receivable 1,160,157 2,095,411
Prepaid expenses (1,177,706) (961,654)
Other assets 109,920 14,497
Accounts payable (257,225) 59,355
Other liabilities (448,005) (189,526)
Other operating activities 38,508 (385,584)
Net cash provided by operating activities 3,934,476 5,605,488
Cash flows from investing activities:    
Capital expenditures (286,876) (369,346)
Payments for translator licenses (30,000)  
Payments for investments    (62,500)
Repayment of notes receivable from related parties 73,591 69,315
Net cash used in investing activities (243,285) (362,531)
Cash flows from financing activities:    
Principal payments on indebtedness (1,000,000) (3,352,178)
Tax benefit (shortfall) from vesting of restricted stock 48,125 (80,104)
Payments for treasury stock (176,512) (103,718)
Net cash used in financing activities (1,128,387) (3,536,000)
Net increase in cash and cash equivalents 2,562,804 1,706,957
Cash and cash equivalents at beginning of period 11,660,648 13,610,069
Cash and cash equivalents at end of period 14,223,452 15,317,026
Cash paid for interest 1,816,398 1,252,033
Cash paid for income taxes 205,495 14,500
Supplement disclosure of non-cash investing and financing activities:    
Property and equipment acquired through placement of advertising airtime $ 29,943 $ 1,799