Accounting for Stock-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended	6 Months Ended		12 Months Ended
	Jul. 08, 2019	Jul. 31, 2020	Aug. 31, 2020	Aug. 31, 2020	Aug. 31, 2019	Feb. 28, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock based compensation expense				$ 686	$ 1,345
Patrick M. Lavelle [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Annual salary and cash bonus	$ 1,000
Stock based compensation expense			$ 61	$ 122
Grant of market stock units maximum amount	$ 5,000
Maximum average stock price of grant market stock units	$ 5.49
Maximum increase amount of market stock units award	$ 5,000
Maximum threshold share price increases in value of award	$ 15.00
Estimated Maximum threshold share increases in value of award	333,333
Patrick M. Lavelle [Member] | Common Class A [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 4.15	$ 4.15
Award vesting period	5 years
Stock based compensation expense			$ 103	$ 206
Stock grants forgeited				26,835
Patrick M. Lavelle [Member] | Common Class A [Member] | March 1, 2021 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Additional grant of shares under employment agreement	100,000
Patrick M. Lavelle [Member] | Common Class A [Member] | March 1, 2020 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Additional grant of shares under employment agreement	100,000
Patrick M. Lavelle [Member] | Common Class A [Member] | March 1, 2022 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Additional grant of shares under employment agreement	100,000
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated Share-based Compensation Expense			335	$ 686
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized			$ 2,060	$ 2,060
2014 Plan [Member] | Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period						3 years
Share-based payment award vesting age of employee						65 years
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted		48,269
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 5.76		$ 5.76
Stock grants forgeited				26,835
Vested and unsettled awards		105,123		59,697
Vested and unsettled awards, weighted average fair value				$ 6.09
Amount of vested and settled awards in cash		$ 303
2014 Plan [Member] | Restricted Stock Units [Member] | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based payment award vesting required service period						10 years
2014 Plan [Member] | Unsettled RSU Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vested and unsettled awards				238,318
Vested and unsettled awards, weighted average fair value				$ 7.51
2012 Equity Incentive Plan [Member] | Patrick M. Lavelle [Member] | Common Class A [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Grant of initial shares under employment agreement	200,000