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Stockholders' Equity - Summary of RSU Activity (Details) - 2013 Equity Incentive Plan - USD ($)		3 Months Ended
	Jan. 09, 2014	Mar. 31, 2022
Restricted Stock Units information
Period for unrecognized compensation expense related to unvested options yet has not been recognized		2 years 3 months 18 days
Upon first anniversary of start date
Restricted Stock Units information
Vesting percentage	25.00%
RSU
NUMBER OF SHARES
Unvested at beginning of period		345,600
Vested		(78,550)
Unvested at end of period		267,050
WEIGHTED-AVERAGE GRANT DATE FAIR VALUE
Unvested at beginning of period		$ 3.70
Vested		3.81
Unvested at end of period		$ 3.66
RSU | Non-executive employees
Restricted Stock Units information
Vesting period		4 years
Unrecognized compensation expense related to unvested service RSUs		$ 849,932
Period for unrecognized compensation expense related to unvested options yet has not been recognized		2 years 9 months 18 days

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