Quarterly report pursuant to Section 13 or 15(d)

New Accounting Standards Implemented (Details)

v3.10.0.1
New Accounting Standards Implemented (Details) - USD ($)
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Jan. 02, 2018
Dec. 31, 2017
Liabilities          
Current portion of deferred revenue $ 0 $ 800,000 $ 1,600,000 $ 2,612,000 $ 3,214,000
Total current liabilities 10,331,000     2,612,000 5,607,000
Deferred revenue, net of current portion 0     0 3,061,000
Total liabilities 10,331,000     5,005,000 8,668,000
Stockholders' Equity          
Accumulated deficit (392,711,000)     (356,129,000) (359,792,000)
Total equity 150,245,000 $ 160,914,000 $ 169,199,000 $ 173,761,000 170,098,000
Scenario Previously Reported          
Liabilities          
Current portion of deferred revenue 602,000       3,214,000
Total current liabilities 10,933,000       3,214,000
Deferred revenue, net of current portion 2,609,000       3,061,000
Total liabilities 13,542,000       8,668,000
Stockholders' Equity          
Accumulated deficit (395,922,000)       (359,792,000)
Total equity 147,034,000       170,098,000
Scenario Adjustment          
Liabilities          
Current portion of deferred revenue (602,000)       (602,000)
Total current liabilities (602,000)       (602,000)
Deferred revenue, net of current portion (2,609,000)       (3,061,000)
Total liabilities (3,211,000)       (3,663,000)
Stockholders' Equity          
Accumulated deficit 3,211,000       3,663,000
Total equity $ 3,211,000       $ 3,663,000