Share Based Award ESPP Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
ESPP Original Issuance	750,000
ESPP Annual Issuance Increase Limit	300,000
Shares available in employee stock purchase plan	156,913
Unrecognized Compensation Expense - ESPP | $	$ 0.1