Stock Repurchase Program (Details) - USD ($)	3 Months Ended							16 Months Ended	19 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Sep. 30, 2019	Feb. 21, 2018
Equity, Class of Treasury Stock [Line Items]
Repurchased Amount					$ 1,862,000	$ 248,000	$ 2,718,000	$ 1,000,000.0
Common Stock
Equity, Class of Treasury Stock [Line Items]
Repurchased Amount	$ 0	$ 0	$ 0	$ 1,008,652					$ 1,008,652
Remaining authorized repurchase amount	$ 14,000,000.0								$ 14,000,000.0
February 2018, 15 Million Share Repurchase Program | Common Stock
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount										$ 15,000,000.0