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Stockholders' Equity - Summary of RSU Activity (Details) - 2013 Equity Incentive Plan - USD ($)		9 Months Ended
	Jan. 09, 2014	Sep. 30, 2020
Restricted Stock Units information
Period for unrecognized compensation expense related to unvested options yet has not been recognized		2 years 4 months 24 days
Upon first anniversary of start date
Restricted Stock Units information
Percent of shares subject to option grant that will vest	25.00%
RSU
NUMBER OF SHARES
Unvested at beginning of period		324,550
Forfeited		(12,382)
Vested		(104,100)
Unvested at end of period		208,068
WEIGHTED-AVERAGE GRANT DATE FAIR VALUE
Unvested at beginning of period		$ 4.53
Forfeited		4.53
Vested		4.53
Unvested at end of period		$ 4.53
RSU | Non-executive employees
Restricted Stock Units information
Unrecognized compensation expense related to unvested service RSUs		$ 679,940
Period for unrecognized compensation expense related to unvested options yet has not been recognized		1 year

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