Mezzanine and Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Class of Stock [Line Items]
Holdback shares not issued to former shareholders (in shares)	302,732
Stock options exercised (in shares)	100,000	6,000
Exercise price of exercises during period (in dollars per share)	$ 2.10	$ 4.50
Options exercised (in shares)	0	0
Options outstanding term	3 years 3 months 22 days		3 years 5 months 1 day
Options outstanding exercise price (in dollars per share)	$ 10.63		$ 9.22
Share-based compensation	$ 1,058	$ 345
Warrants exercised (in shares)	51,601	11,516
Proceeds from warrants exercised	$ 500	$ 100
Treasury shares (in shares)	17,475,707		17,458,810
Allied Pacific of California Brokerage Account
Class of Stock [Line Items]
Treasury stock, value	$ 7,600
APC
Class of Stock [Line Items]
Treasury shares (in shares)	17,307,214		17,290,317
Dividends declared	$ 10,000	$ 10,000
Restricted Stock Units (RSUs)
Class of Stock [Line Items]
Share-based compensation	900
Unrecognized compensation expense	$ 4,600
Restricted Stock Awards
Class of Stock [Line Items]
Restricted stock awards granted (in shares)	97,447
Weighted average grant date fair value (in dollars per share)	$ 17.58
Grant date fair value of restricted stock to be recognized straight-line	$ 1,600
Award vesting period	3 years
Minimum
Class of Stock [Line Items]
Exercise price of warrants exercised (in dollars per share)	$ 9.00	$ 9.00
Maximum
Class of Stock [Line Items]
Exercise price of warrants exercised (in dollars per share)	$ 11.00	$ 11.00
APC Stock Option
Class of Stock [Line Items]
Proceeds of options exercised	$ 200	$ 27
Board Members
Class of Stock [Line Items]
Options granted (in shares)	11,742
Options outstanding term	5 years
Options outstanding exercise price (in dollars per share)	$ 18.41