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Shareholders' Equity (Share Repurchases, Cumberland Emerging Technologies and Cumberland Foundation Narrative) (Details) - USD ($) |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Nov. 27, 2019 | Apr. 30, 2019 | Apr. 30, 2014 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | May 31, 2010
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Repurchase of common shares, value |  |  |  | $ 3,486,835 | $ 2,877,935 | $ 3,719,890 |
Amount available under current repurchase program |  |  |  | 8,000,000.0 |  |  |
Exercise of options and related tax benefit |  | $ 1,000,000 |  |  |  |  |
Payments to acquire interest in subsidiaries |  |  | $ 300,000 |  |  |  |
Loans Forgiven in Exchange For Share Issued, Amount |  |  | $ 700,000 |  |  |  |
Charitable contribution of shares, shares |  |  |  |  | 50,000 |  |
Committed cash contributions |  |  |  | 50,000 |  |  |
Vesting of common stock |  |  |  | $ 862,200 |  |  |
HongKong WinHealth Pharma Group Co. Limited |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Investment in CET |  | 1,000,000.0 |  |  |  |  |
Gloria Pharmaceuticals |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Exchange for consideration, amount |  | $ 800,000 |  |  |  |  |
Nordic |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Vesting of common stock, shares | 180,000 |  |  |  |  |  |
Vesting of common stock | $ 900,000 |  |  |  |  |  |
Common stock |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Repurchase of common shares, shares |  |  |  | 623,478 | 443,041 | 547,376 |
Repurchase of common shares, value |  |  |  | $ 3,486,835 | $ 2,877,935 | $ 3,719,890 |
Vesting of common stock, shares |  |  |  | 180,000 |  |  |
Vesting of common stock |  |  |  | $ 862,200 |  |  |
Shares Repurchase, All, Except Settlement of Tax Liabilities Related to Exercise of Stock Options |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Repurchase of common shares, shares |  |  |  | 623,478 | 443,041 | 547,376 |
Repurchase of common shares, value |  |  |  | $ 3,500,000 | $ 2,900,000 | $ 3,700,000 |
Share Repurchase Program Authorized in 2010 |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |
Share repurchase program, number of shares authorized to be repurchased |  |  |  |  |  |  | $ 10,000,000

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