Stock Based Compensation - Summary of Warrant Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Number of Warrants Outstanding
Warrants outstanding, beginning balance (in shares)	1,608,996	2,011,528
Warrants granted (in shares)	228,607	33,720
Warrants exercised (in shares)	(232,461)	(436,252)
Warrants expired (in shares)	(54,167)
Warrants outstanding, ending balance (in shares)	1,550,975	1,608,996
Weighted- Average Exercise Price
Warrants outstanding, exercise price, beginning balance (in dollars per share)	$ 4.71	$ 4.85
Warrants issued, weighted average exercise price (in dollars per share)	16.00	5.56
Warrants exercised, weighted average exercise price (in dollars per share)	(4.85)	(4.70)
Warrants expired, weighted average exercise price (in dollars per share)	(12.46)
Warrants outstanding, exercise price, ending balance (in dollars per share)	$ 6.08	$ 4.71