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Stockholders' Equity - Summary of RSU Activity (Details) - 2013 Equity Incentive Plan - USD ($)		6 Months Ended
	Jan. 09, 2014	Jun. 30, 2020
Restricted Stock Units information
Period for unrecognized compensation expense related to unvested options yet has not been recognized		2 years 6 months
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)
Unvested at end of period		312,168
WEIGHTED-AVERAGE GRANT DATE FAIR VALUE
Unvested at beginning of period		$ 4.53
Forfeited		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		$ 858,158
Period for unrecognized compensation expense related to unvested options yet has not been recognized		1 year 2 months 12 days

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