Stock Based Compensation Table of Stock Option Activity Rollforward (Details) - Employee Stock Option	3 Months Ended
	Mar. 31, 2017 $ / shares shares
Options Outstanding
Balance at beginning of period | shares	251,237
Granted | shares	570,627
Balance at end of period | shares	821,864
Weighted Average Exercise Price (in dollars per stock option)
Weighted average exercise price, beginning balance	$ 5.69
Granted	6.65
Weighted average exercise price, ending balance	6.36
Weighted Average Grant Date Value (in dollars per stock option)
Weighted average grant date value, beginning balance	2.62
Granted	2.91
Weighted average grant date value, ending balance	$ 2.82
Options Exercisable
Options Exercisable | shares	0
Options Exercisable | shares	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average remaining contractual term at March 31, 2017 (in years)	9 years 7 months 12 days