Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Financial Statements Detail - Additional Information 3 (Details)

v3.7.0.1
Condensed Consolidated Financial Statements Detail - Additional Information 3 (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2017
Jun. 30, 2016
Property, Plant and Equipment [Line Items]      
Total proceeds from sale of equipment and disposal of certain equipment   $ 1,614,000 $ 45,000
Total carrying value of equipment sold and disposed $ 400,000 400,000  
Other Income (Expense) [Member]      
Property, Plant and Equipment [Line Items]      
Gain (loss) on sale and disposal of equipment $ (88,000) $ 1,200,000