Annual report pursuant to Section 13 and 15(d)

Subsequent Events - Additional Information (Details)

v3.19.1
Subsequent Events - Additional Information (Details) - 2017 Equity Incentive Plan - Subsequent Event
Mar. 27, 2019
shares
Subsequent Event [Line Items]  
Number of shares, granted 28,755
Remaining vesting period 4 years
Performance Based Grants  
Subsequent Event [Line Items]  
Number of shares, granted 15,025
Chief Executive Officer and President  
Subsequent Event [Line Items]  
Number of shares, granted 8,025
Chief Executive Officer and President | Continued Employment  
Subsequent Event [Line Items]  
Number of shares, granted 8,025
Chief Financial Officer and General Counsel  
Subsequent Event [Line Items]  
Number of shares, granted 3,500
Chief Financial Officer and General Counsel | Continued Employment  
Subsequent Event [Line Items]  
Number of shares, granted 3,500
Minimum  
Subsequent Event [Line Items]  
Stock vested percentage based on achievement of goal 0.00%
Maximum  
Subsequent Event [Line Items]  
Stock vested percentage based on achievement of goal 200.00%