Stockholders' Equity - Stock Option Activity (Details)	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Number of Options Outstanding
Outstanding at beginning of period (in shares) | shares	329,698
Options exercised (in shares) | shares	(8,712)
Options vested (in shares) | shares	0
Options expired (in shares) | shares	(73)
Outstanding at end of period (in shares) | shares	320,913
Weighted– Average Exercise Price
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 8.57
Options exercised (in dollars per share) | $ / shares	6.13
Options forfeited (in dollars per share) | $ / shares	0
Options expired (in dollars per share) | $ / shares	1.79
Outstanding at end of period (in dollars per share) | $ / shares	$ 8.64