Significant Accounting Policies Right of Use Assets and Liabilities (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Balance Sheet Location [Line Items]
Total operating lease liabilities	$ 3,682
Other noncurrent assets
Balance Sheet Location [Line Items]
Operating lease assets	3,682
Accrued expenses and other
Balance Sheet Location [Line Items]
Operating lease liabilities, current	1,379
Other noncurrent liabilities
Balance Sheet Location [Line Items]
Operating lease liabilities, noncurrent	$ 2,303