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Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Payables and Accruals [Abstract]    
Accrued vacation $ 122 $ 42
Accrued wages and incentive 476 527
Accrued clinical & consulting 2,700 1,820
Accrued legal & patent 70 85
Accrued other expenses 77 40
Total accrued expenses $ 3,445 $ 2,514