Stockholders' Equity - Schedule of Pre-2017 Non-Qualified Stock Options Nonvested Share Activity (Details) - Pre-2017 Non-Qualified Stock Options	Jun. 30, 2019 $ / shares shares
Number of Shares
Non-vested (in shares) | shares	88,064
Weighted Average Grant Date Fair Value Per Share
Non-vested (in dollars per share) | $ / shares	$ 7.75