Equity - Options (Details) - USD ($)	1 Months Ended												6 Months Ended
	Jun. 30, 2016	May 31, 2016	Apr. 30, 2016	Mar. 31, 2016	Feb. 29, 2016	Jan. 31, 2016	Jun. 30, 2015	May 31, 2015	Apr. 30, 2015	Mar. 31, 2015	Feb. 28, 2015	Jan. 31, 2015	Jun. 30, 2016	Jun. 30, 2015
Stock Based Compensation Plans
Options outstanding at end of the period (in shares)	33,334												33,334
Options exercisable at end of the period (in shares)	28,334												28,334
Nonvested awards
Number of Awards	5,000												5,000
2015 Plan
Stock Based Compensation Plans
Total shares reserved for issuance of common stock related to the conversion of preferred stock	1,400,000												1,400,000
Stock options granted (in shares)													0	0
Options exercised (in shares)													6,667	3,333
Weighted Average Exercise Price (in dollars per share)													$ 23.79	$ 23.79
Value of options exercised	$ 159,000						$ 79,000						$ 159,000	$ 79,000
Market value of options on the date of exercise	311,000						140,000						311,000	$ 140,000
Stock options
Stock Based Compensation Plans
Compensation expense, vested awards	8,000	$ 8,000	$ 8,000	$ 8,000	$ 8,000	$ 8,000	$ 8,000	$ 8,000	$ 8,000	$ 8,000	$ 8,000	$ 8,000
2016
Nonvested awards
Remaining compensation expense	7,000												7,000
2017
Nonvested awards
Remaining compensation expense	$ 3,000												$ 3,000