Mezzanine and Stockholders' Equity - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 18, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Class of Stock [Line Items]
Repurchase of common shares				$ 40,000	$ 0
Holdback shares not issued to former shareholders (in shares)				480,212
Stock options exercised (in shares)				111,000	240,500
Options exercised pursuant to cashless exercise provision (in shares)					60,536
Shares issued in cashless exercise provision (in shares)					47,576
Options granted (in shares)				45,000
Warrants exercised (in shares)				41,624	210,625
Proceeds from warrants exercised				$ 400,000	$ 1,500,000
Treasury shares (in shares)		1,944,054		1,944,054		1,850,603
Minimum
Class of Stock [Line Items]
Exercise price of exercises during period (in dollars per share)		$ 1.5	$ 0.01	$ 1.5	$ 0.01
Exercise price of warrants (in dollars per share)				9.00	4.00
Maximum
Class of Stock [Line Items]
Exercise price of exercises during period (in dollars per share)		$ 5.79	$ 10	$ 5.79	$ 10
Exercise price of warrants (in dollars per share)				11.00	10.00
Allied Pacific of California
Class of Stock [Line Items]
Repurchase of common shares	$ 1,700,000
Shares repurchased (in shares)	1,662,571
Treasury shares (in shares)		1,775,561		1,775,561		1,682,110
CDSC
Class of Stock [Line Items]
Dividends paid				$ 1,200,000
Restricted Stock Units (RSUs)
Class of Stock [Line Items]
Share-based compensation				$ 200,000
Stock Compensation Plan
Class of Stock [Line Items]
Recognition term of unrecognized share-based compensation				3 months
APC Stock Option
Class of Stock [Line Items]
Proceeds of options exercised				$ 500,000	$ 800,000
APCN share Holder
Class of Stock [Line Items]
Purchase of treasury shares (in shares)						168,493
APC Common Stock
Class of Stock [Line Items]
Dividends paid		$ 10,000,000	$ 2,000,000
Network Medical Management, Inc. | Stock Compensation Plan
Class of Stock [Line Items]
Unrecognized share-based compensation expense		$ 200,000		$ 200,000
Holdback Shares
Class of Stock [Line Items]
Treasury shares (in shares)		93,451		93,451