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Treasury Stock - Additional Information (Details) - USD ($)		1 Months Ended		3 Months Ended	6 Months Ended	10 Months Ended
	Aug. 07, 2018	Sep. 09, 2019	Aug. 31, 2017	Jun. 30, 2020	Jun. 30, 2020	Jun. 30, 2020
Share Repurchase Program September 9, 2019
Equity Class Of Treasury Stock [Line Items]
Stock repurchase, shares						162,000
Common stock repurchase, value				$ 1,600,000	$ 1,600,000	$ 1,600,000
Common Stock | Share Repurchase Program August 2017
Equity Class Of Treasury Stock [Line Items]
Stock approved for repurchase, value			$ 7,000,000.0
Period of stock repurchase program			12 months
Additional period of stock repurchase program	12 months
Common Stock | Share Repurchase Program September 9, 2019
Equity Class Of Treasury Stock [Line Items]
Stock approved for repurchase, value		$ 7,000,000.0
Period of stock repurchase program		12 months
Common Stock | Share Repurchase Program August 2017 and September 2019
Equity Class Of Treasury Stock [Line Items]
Stock repurchase, shares				46,000	69,000
Stock repurchase, average price per share				$ 9.17	$ 8.78
Stock repurchase, cost				$ 418,000	$ 608,000

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