Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Aggregate number of common shares reserved for future issuance.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The noncash expense that represents the cost of restricted stock or unit distributed to employees as compensation.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Gross number of share options (or share units) granted during the period.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Percentage of vesting of share-based compensation awards.

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Amount of capitalized and expensed compensation cost from equity-based compensation arrangements.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Stockholders' Equity - Additional Information (Details) - USD ($)										3 Months Ended		12 Months Ended
	Mar. 31, 2022	Jan. 01, 2022	Mar. 31, 2021	Jan. 01, 2021	Mar. 31, 2020	Mar. 13, 2020	Feb. 28, 2020	Jan. 31, 2020	Jan. 01, 2020	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate shares of common stock options granted (in shares)										230,000
Exercise price of options (in dollars per share)										$ 2.23
2011 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized					13,000,000					13,000,000
Shares of common stock available for issuance (in shares)					1,610,649					1,610,649
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate shares of common stock options granted (in shares)					50,000
Exercise price of options (in dollars per share)					$ 0.61
Vesting rights (percentage per year)	33.33%		33.33%
Unrecognized compensation expense related to unvested stock options					$ 276,000					$ 276,000
Weighted average period of recognition										1 year 8 months 16 days
Employee Stock Option \| Five year expiration
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period										5 years
Employee Stock Option \| Seven year expiration
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period										7 years
Employee Stock Option \| Ten year expiration
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period										10 years
Employee Stock Option \| Key Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate shares of common stock options granted (in shares)						50,000
Exercise price of options (in dollars per share)						$ 5.50
Employee Stock Option \| Consultant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate shares of common stock options granted (in shares)								75,000
Exercise price of options (in dollars per share)								$ 1.57
Employee Stock Option \| Board Observer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate shares of common stock options granted (in shares)									5,000
Exercise price of options (in dollars per share)									$ 4.00
Vesting rights (percentage per year)		50.00%		50.00%
Employee Stock Option \| Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate shares of common stock options granted (in shares)							50,000
Exercise price of options (in dollars per share)							$ 1.40
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense related to unvested stock options					$ 43,000					$ 43,000
Weighted average period of recognition										1 year
Compensation expense related to restricted stock grants										$ 23,000	$ 104,000
Management Stock Bonus
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense										152,000
Equity Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to stock options										68,000	$ 243,000
Warrant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense										$ 0		$ 0
Warrant \| Five year expiration
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period										5 years
Warrant \| Ten year expiration
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period										10 years
Warrant \| 2011 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock reserved for issuance (in shares)					9,812,233					9,812,233