Stock Options (Details) - USD ($)	1 Months Ended	3 Months Ended
	Jan. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018
Number of Shares
Balance, Beginning of period (shares)		10,333
Granted (shares)		0
Forfeited (shares)		0
Exercised (shares)		(5,333)
Balance, End of period (shares)		5,000
Outstanding exercisable options at end of quarter (shares)				5,000
Weighted Average Exercise Price (in dollars per share)
Beginning balance (usd per share)		$ 1.21		$ 1.21
Granted (usd per share)		0.00
Forfeited (usd per share)		(0.00)
Exercised (usd per share)		(1.21)
Ending balance (usd per share)		1.21
Outstanding exercisable options at end of quarter (usd per share)				$ 1.21
Intrinsic value of exercisable options				$ 40,000
Restricted Stock Units (RSUs) [Member]
Weighted Average Exercise Price (in dollars per share)
Granted (usd per share)		$ 7.00
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Beginning Balance (in shares)		125,333
Grants (in shares)	2,500	2,500
Vested (in shares)		(22,167)
Forfeited (in shares)		(1,333)
Ending Balance (in shares)		104,333
Weighted Average Grant Date Fair Value, Beginning Balance (in dollars per share)		$ 5.13
Weighted Average Grant Date Fair Value, vested (in dollars per share)		(5.62)
Weighted Average Grant Date Fair Value, forfeited (in dollars per share)		(4.95)
Weighted Average Grant Date Fair Value, Ending Balance (in dollars per share		$ 5.14
Vesting period		3 years
Stock option expense		$ 117,000	$ 151,000
Compensation not yet recognized				$ 535,000