Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details)

v3.19.3.a.u2
Stockholders' Equity (Details) - USD ($)
6 Months Ended 12 Months Ended
Jan. 03, 2019
Jan. 05, 2018
Jan. 31, 2020
Jan. 31, 2019
Jul. 31, 2018
Jul. 31, 2019
Dec. 31, 2014
Jan. 14, 2011
Stockholders' Equity (Details) [Line Items]                
Common Stock, Par or Stated Value Per Share (in Dollars per share)     $ 0.01     $ 0.01    
Percentage of Commission Payable on Equity Offering     3.00%          
Maximum Offering Price Under Sales Agreement     $ 20,000,000       $ 20,000,000  
Excess Tax Benefit from Share-based Compensation, Financing Activities     0 $ 0        
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount     $ 500,000          
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition     10 months          
Performance Shares [Member]                
Stockholders' Equity (Details) [Line Items]                
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     3 years          
Restricted Stock [Member]                
Stockholders' Equity (Details) [Line Items]                
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in Shares)     817          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value (in Dollars per share)     $ 3.34          
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount     $ 6,000          
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Outstanding Weighted Average Remaining Contractual Terms     1 year          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)     0          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in Shares)     811          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value     $ 2,000          
2011 Plan [Member]                
Stockholders' Equity (Details) [Line Items]                
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)   5,000,000           3,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized (in Shares)   2,000,000            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)     1,677,000          
Common Stock [Member]                
Stockholders' Equity (Details) [Line Items]                
Authorized Common Stock That May Be Issued And Sold Under Sales Agreement         $ 19,150,000      
Securities That May Be Sold Under The Agreement         $ 150,000,000      
Executive Officer [Member] | Performance Shares [Member]                
Stockholders' Equity (Details) [Line Items]                
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     3 years   3 years      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in Shares) 10,500   14,500   4,000      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in Shares) 70,000       28,000      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares) 80,500       32,000      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value $ 196,000       $ 124,000