Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation - Compensation Cost (Details)

v3.19.1
Stock-based Compensation - Compensation Cost (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]    
Stock-based compensation expense $ 1,816,000 $ 1,662,000
Tax benefit from compensation expense 0 0
Cash received from option exercised $ 0 $ 0