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Other Financial Information
 6 Months Ended
Jun. 30, 2020
Other Financial Information [Abstract]  
Other Financial Information Other Financial Information
Prepaid Expenses and Other Current Assets
Prepaid expenses and other current assets consist of the following (in thousands):
 
 June 30, 2020December 31, 2019
Diagnostic testing supplies$947  $1,427  
Prepaid product royalties75  123  
Prepaid maintenance and insurance contracts1,277  1,768  
Other prepaid assets201  133  
Prepaid and other current assets$2,500  $3,451  

Property and Equipment
Property and equipment consist of the following (in thousands):
 
 June 30, 2020December 31, 2019
Furniture and fixtures$36  $25  
Laboratory equipment2,541  2,228  
Computer equipment and software915  851  
Leasehold improvements424  424  
Construction in progress102  247  
Total property and equipment4,018  3,775  
Less: accumulated depreciation and amortization(2,648) (2,395) 
Property and equipment, net$1,370  $1,380  
Depreciation and amortization expense for the three months ended June 30, 2020 and 2019 was approximately $0.2 million, and for the six months ended June 30, 2020 and 2019, was approximately $0.3 million and $0.4 million. At June 30, 2020 and December 31, 2019, the gross book value of assets under capital lease was $1.1 million and $0.8 million, respectively, and is classified in "Laboratory equipment" in the table above.

 
Accrued and Other Current Liabilities
Accrued and other current liabilities consist of the following (in thousands):
 
 June 30, 2020December 31, 2019
Accrued payroll and related expenses$2,534  $2,362  
Accrued interest141  145  
Accrued purchases of goods and services318  319  
Accrued royalties193  727  
Accrued clinical study activity93  40  
Capital lease obligations, current portion242  238  
Other accrued liabilities796  588  
Accrued and other current liabilities$4,317  $4,419