Description of Business and Summary of Significant Accounting Policies - Accounting for Stock-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Jul. 08, 2019	Feb. 28, 2022	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2015
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares available for grant		1,147,000
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized		$ 0
Non-cash stock-based compensation expense		$ 907	$ 1,749	$ 2,282
2014 Plan [Member]
Description Of Business And Summary Of Significant Accounting Policies [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		$ 13.59	$ 7.18	$ 4.21
Vested and unissued shares		197,891	99,697	127,007
Weighted Average Grant Date Fair Value, Vested		$ 5.76	$ 7.21	$ 4.18
Patrick M. Lavelle [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Annual salary and cash bonus	$ 1,000
Non-cash stock-based compensation expense		$ 241	$ 241	$ 157
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
Maximum threshold share price half of the award can be granted	$ 13.00
Estimated Maximum threshold share increases in value of award	333,333
Common Class A [Member] | Patrick M. Lavelle [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Award vesting period	5 years
Common Class A [Member] | Patrick M. Lavelle [Member] | 2012 Plan [Member]
Description Of Business And Summary Of Significant Accounting Policies [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
Grant of initial shares under employment agreement	200,000
Non-cash stock-based compensation expense				$ 830
Share based compensation related to additional stock grants		$ 157	$ 409	$ 679
Common Class A [Member] | Patrick M. Lavelle [Member] | 2012 Plan [Member] | March 1, 2021 [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Additional grant of shares under employment agreement	100,000
Common Class A [Member] | Patrick M. Lavelle [Member] | 2012 Plan [Member] | March 1, 2020 [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Additional grant of shares under employment agreement	100,000
Common Class A [Member] | Patrick M. Lavelle [Member] | 2012 Plan [Member] | March 1, 2022 [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Additional grant of shares under employment agreement	100,000
Incentive Stock Options [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Percentage of stockholders granted exercise price		10.00%
Incentive Stock Options [Member] | Common Class A [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Percentage of fair market value of stock allowed for exercise price of options to be granted		110.00%
Employee Stock Option [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Share-based compensation arrangement by share-based payment award, options, grants in period, gross		0	0	0
Allocated share-based compensation expense		$ 0	$ 0	$ 0
Restricted Stock Units [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Share-based compensation arrangement by share-based payment award, expiration period					3 years
Allocated share-based compensation expense		907	$ 1,749	$ 2,282
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized		$ 1,220
Stock issued during period, shares, restricted stock award, gross		48,527	48,269	71,352
Share-based Compensation arrangement by share-based payment award, equity instruments other than options, grants in period, weighted average grant date fair value		$ 13.59	$ 5.76	$ 4.65
Share-based payment award vesting age of employee					65 years
Restricted Stock Units [Member] | 2014 Plan [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Vested and unissued shares			105,123
Amount of vested and settled awards in cash			$ 575
Unissued Restricted Stock Unit Awards [Member] | 2014 Plan [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Vested and unissued shares		476,209
Weighted Average Grant Date Fair Value, Vested		$ 6.90
Minimum [Member] | All Other Options and Stock Appreciation Rights [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Percentage of fair market value of stock allowed for exercise price of options to be granted		100.00%
Minimum [Member] | All Other Options and Stock Appreciation Rights [Member] | Common Class A [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Percentage of fair market value of stock allowed for exercise price of options to be granted		100.00%
Maximum [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Share-based compensation arrangement by share-based payment award, expiration period		10 years
Maximum [Member] | Restricted Stock Units [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Share-based payment award vesting required service period					10 years