Stock-based Compensation - 2014 Equity Incentive Plan (Details) - shares		3 Months Ended	6 Months Ended
	May 02, 2014	Mar. 31, 2016	Jun. 30, 2016	Jan. 01, 2016	Dec. 31, 2015	Jan. 01, 2015
2014 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Effective date of equity incentive plan	May 02, 2014
Common stock outstanding percentage	4.00%
Number of shares of common stock for future issuance, board of directors prerogative, increase in period (in shares)	0
Possible future issuance under equity compensation plan (in shares)			683,892	556,223	552,415	340,484
Options granted in period (in shares)		354,125	440,920
2014 Equity Incentive Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Base number of new shares available for future issuance under equity incentive plan (in shares)	1,122,731
Common stock issuable period	10 years
2009 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of additional awards expected to be granted (in shares)	0