Subsequent Events (Details) $ in Thousands		12 Months Ended
	Jan. 13, 2020 employee installment shares	Dec. 31, 2019 USD ($)
Subsequent Events
Product Liability Contingency, Loss Exposure Not Accrued, Best Estimate		$ 650
Number of non-employee directors | employee	6
Granted (in shares) | shares	60,000
Number of equal monthly installments | installment	36
Maximum
Subsequent Events
Product Liability Contingency, Loss Exposure Not Accrued, Best Estimate		$ 1,100