XML 94 R75.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Equity Compensation Plan - Equity Plan Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2017
Dec. 31, 2016
Aug. 05, 2014
Aug. 04, 2014
Performance-Based Restricted Stock Units          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Issuance of stock (in shares)   162,613 146,552    
Restricted shares, vesting term   3 years 3 years    
Closing price of common stock on grant date   $ 5.66 $ 4.96    
Performance-Based Restricted Stock Units | 2017 Award Grants          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Compensation expense related to restricted stock grant $ 16        
Unrecognized stock compensation expense 136        
Performance-Based Restricted Stock Units | 2016 Award Grants          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Compensation expense related to restricted stock grant $ 62        
Performance-Based Restricted Stock Units | Return to Capital Exceeds 10%          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Restricted shares, vesting term   10 years 10 years    
Performance-Based Restricted Stock Units | Involuntary Termination          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Restricted shares, vesting term   3 years 3 years    
Minimum | Performance-Based Restricted Stock Units          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Percentage of total return to stockholders   10.00% 10.00%    
Anworth Mortgage Asset Corporation 2014 Equity Plan          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Maximum authorized shares of common stock under grant of stock options and other stock-based awards       2,000,000  
Anworth Mortgage Asset Corporation 2004 Equity Plan          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]          
Maximum authorized shares of common stock under grant of stock options and other stock-based awards         3,500,000