Stock-Based Compensation (Details) - Class B [Member] - USD ($) $ / shares in Units, $ in Thousands			9 Months Ended
	May 22, 2019	Nov. 13, 2018	Sep. 30, 2019
Stock Based Compensation [Abstract]
Shares distribution period from grant date			1 year
5/9/2017 [Member]
Summary of stock Issuances [Abstract]
Number of shares issued (in shares)			18,183
Vesting date			May 09, 2018
Service period			7/1/2017 - 6/30/2018
Grant date fair value per share (in dollars per share)			$ 24.20
8/31/2017 [Member]
Summary of stock Issuances [Abstract]
Number of shares issued (in shares)			1,257
Vesting date			May 09, 2018
Service period			8/31/2017 - 6/30/2018
Grant date fair value per share (in dollars per share)			$ 21.90
2/9/2018 [Member]
Summary of stock Issuances [Abstract]
Number of shares issued (in shares)			408
Vesting date			May 09, 2018
Service period			2/9/2018 - 6/30/2018
Grant date fair value per share (in dollars per share)			$ 24.20
5/8/2018 [Member]
Summary of stock Issuances [Abstract]
Number of shares issued (in shares)			19,085
Vesting date			May 08, 2019
Service period			7/1/2018 - 6/30/2019
Grant date fair value per share (in dollars per share)			$ 23.05
5/7/2019 [Member]
Summary of stock Issuances [Abstract]
Number of shares issued (in shares)			29,536
Vesting date			May 07, 2020
Service period			7/1/2019 - 6/30/2020
Grant date fair value per share (in dollars per share)			$ 16.25
5/17/2019 [Member]
Summary of stock Issuances [Abstract]
Number of shares issued (in shares)			3,591
Vesting date			May 07, 2020
Service period			7/1/2019 - 6/30/2019
Grant date fair value per share (in dollars per share)			$ 16.25
5/22/2019 [Member]
Summary of stock Issuances [Abstract]
Number of shares issued (in shares)			3,541
Vesting date			May 07, 2020
Service period			7/1/2019 - 6/30/2020
Grant date fair value per share (in dollars per share)			$ 16.25
Restricted [Member] | Chief Executive Officer [Member]
Summary of stock Issuances [Abstract]
Number of shares issued (in shares)		85,000
Stock based compensation expense			$ 844
Restricted [Member] | Chief Executive Officer [Member] | 10/17/2019 [Member]
Summary of stock Issuances [Abstract]
Number of shares vested (in shares)		42,500
Restricted [Member] | Chief Executive Officer [Member] | 10/17/2020 [Member]
Summary of stock Issuances [Abstract]
Number of shares vested (in shares)		21,250
Restricted [Member] | Chief Executive Officer [Member] | 10/17/2021 [Member]
Summary of stock Issuances [Abstract]
Number of shares vested (in shares)		21,250
2017 VCIP Awards [Member] | Performance Based Equity Award [Member]
Summary of stock Issuances [Abstract]
Number of shares issued (in shares)			0
Performance period			3 years
Vesting period			3 years
2018 LTIP Awards [Member] | Performance Based Equity Award [Member]
Summary of stock Issuances [Abstract]
Number of shares issued (in shares)			0
2018 VCIP Awards [Member] | Performance Based Equity Award [Member]
Summary of stock Issuances [Abstract]
Number of shares issued (in shares)			0
Performance period			3 years
Vesting period			3 years
2019 LTIP Awards [Member] | Performance Based Equity Award [Member]
Summary of stock Issuances [Abstract]
Vesting period			3 years
Stock based compensation expense			$ 107
Annual vesting percentage of shares in year one			33.30%
Annual vesting percentage of shares in year two			33.30%
Annual vesting percentage of shares in year three			33.30%
Edgecliffe-Johnson Stock Grant [Member] | Restricted [Member]
Summary of stock Issuances [Abstract]
Number of shares issued (in shares)	70,000
Stock based compensation expense			$ 122
Edgecliffe-Johnson Stock Grant [Member] | Restricted [Member] | 6/01/2022 [Member]
Summary of stock Issuances [Abstract]
Number of shares vested (in shares)	35,000
Edgecliffe-Johnson Stock Grant [Member] | Restricted [Member] | 6/01/2023 [Member]
Summary of stock Issuances [Abstract]
Number of shares vested (in shares)	21,000
Edgecliffe-Johnson Stock Grant [Member] | Restricted [Member] | 6/01/2024 [Member]
Summary of stock Issuances [Abstract]
Number of shares vested (in shares)	14,000