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7. Stock-Based Compensation (Details)	3 Months Ended
	Mar. 31, 2021 $ / shares shares
Share-based Payment Arrangement, Noncash Expense [Abstract]
Shares available for grant, beginning (in thousands)	380
Shares available for grant, authorized (in thousands)	816
Shares available for grant, granted (in thousands)	(950)
Shares available for grant, exercised (in thousands)	0
Shares available for grant, forfeited/expired (in thousands)	61
Shares available for grant, ending (in thousands)	307
Number of outstanding, beginning (in thousands)	5,327
Number of shares, granted (in thousands)	950
number of shares, exercised (in thousands)	(1,211)
Number of shares, forfeited/expired (in thousands)	(61)
Number of outstanding, ending (in thousands)	5,005
Weighted average exercise price outstanding, beginning | $ / shares	$ 1.14
Weighted average exercise price, granted | $ / shares	3.09
Weighted average exercise price, exercised | $ / shares	1.49
Weighted average exercise price, forfeited/expired | $ / shares	1.91
Weighted average exercise price outstanding, ending | $ / shares	$ 1.41

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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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-SubTopic 10
-Section 50
-Paragraph 2
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Weighted average price of options that were either forfeited or expired.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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

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

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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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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Number of share options (or share units) exercised during the current period.

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