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Consolidated Statements of Cash Flows - USD ($)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Cash flows from operating activities:    
Net income $ 13,383,642 $ 6,481,049
Adjustments to reconcile net income to net cash provided by operating activities:    
Stock-based compensation 2,118,718 1,945,669
Provision for bad debts 692,460 2,842,941
Depreciation and amortization 7,349,682 6,601,123
Change in fair value of contingent consideration   4,415,925
Gain on dispositions (20,657,360)  
Impairment losses 13,657,941  
Amortization of loan fees 1,935,932 1,899,532
Loss on modification of long-term debt   281,021
Deferred income taxes (1,753,952) 7,749,100
Equity in earnings of unconsolidated affiliates (141,827)  
Change in operating assets and liabilities:    
Accounts receivable (2,852,760) (12,590,742)
Prepaid expenses (382,010) 2,867,240
Other assets (239,601) 2,092,660
Accounts payable 712,257 1,763,322
Other liabilities 6,813,784 (882,127)
Other operating activities 354,318 (79,610)
Net cash provided by operating activities 20,991,224 24,394,480
Cash flows from investing activities:    
Payments for acquisitions (17,264,484) (39,520,000)
Capital expenditures (9,030,025) (4,209,668)
Proceeds from dispositions 26,349,462  
Payments for translator licenses   (202,675)
Payments for investments (5,009,999) (1,680,000)
Net cash used in investing activities (4,955,046) (45,612,343)
Cash flows from financing activities:    
Issuance of debt 11,000,000 35,000,000
Payments on debt (16,000,000) (8,064,019)
Payments of debt issuance costs   (553,062)
Reduction of finance lease liabilities (67,492)  
Dividends paid (5,539,608) (5,388,512)
Purchase of treasury stock (214,735) (265,106)
Net cash provided by (used in) financing activities (10,821,835) 20,729,301
Net increase (decrease) in cash and cash equivalents 5,214,343 (488,562)
Cash and cash equivalents at beginning of period 13,433,828 13,922,390
Cash and cash equivalents at end of period 18,648,171 13,433,828
Cash paid for interest 16,377,994 13,985,580
Cash paid for income taxes 4,253,747 928,750
Supplement disclosure of non-cash investing and financing activities:    
Dividends declared but unpaid 1,396,621 1,373,511
Note receivable and accrued interest converted to investment   187,618
Media advertising exchanged for investment 1,000,000  
Note issued to seller for acquisition 16,500,000  
Liability assumed from seller for acquisition 10,000,000  
Postretirement Benefits Plan [Member]    
Adjustments to reconcile net income to net cash provided by operating activities:    
Termination of pension plan   (992,623)
Class A Common Stock [Member]    
Supplement disclosure of non-cash investing and financing activities:    
Class A common stock returned to treasury stock   13,515,406
Class A common stock issued for acquisition 198,500 $ 29,888
Class A common stock issued for investment $ 974,125