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Condensed Consolidated Statements of Cash Flows - USD ($)
 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Cash flows from operating activities:    
Net income (loss) $ (2,005,734) $ (607,230)
Discontinued operations 1,556,895 1,918,845
Net income (loss) from continuing operations (3,562,629) (2,526,075)
Adjustments to reconcile net income (loss) from continuing operations to net cash provided by (used in) operating activities:    
Depreciation and amortization expense 2,334,669 2,174,397
Deferred tax expense 0 43,605
Share-based compensation 542,923 760,982
Decrease in non-cash contingent consideration (645,571) (321,894)
Noncash interest expense 22,973 28,111
Noncash investment gains 0 (125,804)
Net changes in assets and liabilities affecting operating activities:    
Accounts receivable (80,421) (652,652)
Inventories 1,158,916 883,545
Other current assets and other assets 1,017,650 141,577
Accounts payable and other current liabilities 2,413,768 (163,530)
Other long-term liabilities (869,644) (342,940)
Net cash provided by (used in) operating activities from continuing operations 2,332,634 (100,678)
Discontinued operations 1,371,437 1,565,604
Net cash provided by (used in) operating activities 3,704,071 1,464,926
Cash flows from investing activities:    
Additions to property and equipment (50,883) (89,070)
Purchases of marketable securities 0 (9,627,191)
Proceeds from sale of marketable securities 0 8,563,988
Cash paid for acquisition 0 (5,000,000)
Additions to intangible assets (722,131) (395,005)
Net cash used in investing activities (773,014) (6,547,278)
Cash flows from financing activities:    
Borrowings on line of credit 35,500,000 36,000,000
Repayments on line of credit (37,000,000) (36,000,000)
Cash payment of contingent consideration (260,735) (684,738)
Repurchase of subsidiary shares from noncontrolling interest (800,000) 0
Repurchase of common shares (1,209,220) (1,220,690)
Net cash used in financing activities (3,769,955) (1,905,428)
Net decrease in cash and cash equivalents (838,898) (6,987,780)
Cash and cash equivalents at beginning of period 28,212,635 27,938,960
Cash and cash equivalents at end of period $ 27,373,737 $ 20,951,180