Summary of Significant Accounting Policies - Common Shares Outstanding (Details) - shares	3 Months Ended
	Jun. 30, 2019	Mar. 31, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)	4,217,971	4,217,596
Issuance of shares in acquisition (in shares)	11,145
Vesting of restricted stock unit awards (in shares)	5,354	375
Shares withheld to cover taxes (in shares)	(883)
Ending balance (in shares)	4,233,587	4,217,971