Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Stock-Based Compensation - Additional Information (Detail)

v3.7.0.1
Note 10 - Stock-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended
Feb. 29, 2016
Mar. 31, 2017
Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation   $ 607 $ 4,670
Former Chief Executive Officer [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Severance cost     1,100
Lump sum payment for severance pay     $ 250
Unvested restricted stock awards, remaining number of shares     500,000
Former Chief Executive Officer [Member] | Salaries And Benefits [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Accelerated former CEO stock compensation expense     $ 3,900
Former Chief Executive Officer [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Period for severance pay     12 months
Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock awards granted   700 $ 300
Total unrecognized expense for unvested restricted stock awards   $ 1,300  
Total unrecognized expense for unvested restricted stock awards, weighted average period (in years)   1 year 2 months  
Stock-based compensation   $ 100 $ 14
Restricted stock awards grant date fair value   $ 700  
Stock Compensation Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options contractual term 10 years    
Fair value of options granted $ 300    
Vesting period 2 years    
Stock Compensation Plan [Member] | Interim Chief Executive Officer President And Chairman [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock option plan, shares granted during period 137,362    
Stock option exercise price $ 1.89    
Stock option grant date fair value per share $ 1.72    
Stock Compensation Plan [Member] | Lead Director Of The Board Of Directors [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock option plan, shares granted during period 54,945    
Stock option exercise price $ 1.89    
Stock option grant date fair value per share $ 1.72