Notes Payable (Details Narrative) - USD ($) $ in Thousands | Apr. 06, 2017 | Jun. 01, 2016 | Oct. 27, 2015 | Aug. 12, 2015 | Apr. 16, 2015 | Feb. 02, 2015 | Sep. 24, 2014 | Feb. 22, 2013 | May 30, 2012 | Sep. 12, 2011 | Mar. 31, 2010 | Jul. 31, 2017 | Jul. 31, 2016 |
Short-term Debt [Line Items] | | | | | | | | | | | | | |
Proceeds from unrelated third party | | | | | | | | | | | | $ 100 | $ 325 |
Frost Gamma Investment Trust [Member] | 2011 Promissory Notes [Member] | | | | | | | | | | | | | |
Short-term Debt [Line Items] | | | | | | | | | | | | | |
Beneficial ownership percentage | | | | | | | | | | 10.00% | | | |
Aggregate principal amount | | | | | | | | | | $ 50 | | | |
Debt instrument maturity date | | | | | | | | | | Jul. 31, 2018 | | | |
Debt instrument interest rate | | | | | | | | | | 11.00% | | | |
Proceeds from unrelated third party | | | | | | | | | | $ 100 | | | |
Frost Gamma Investment Trust [Member] | 2015 Promissory Note [Member] | | | | | | | | | | | | | |
Short-term Debt [Line Items] | | | | | | | | | | | | | |
Beneficial ownership percentage | | | 10.00% | 10.00% | 10.00% | | | | | | | | |
Aggregate principal amount | | | $ 50 | $ 25 | $ 100 | | | | | | | | |
Debt instrument maturity date | | | Jul. 31, 2018 | Jul. 31, 2018 | Jul. 31, 2018 | | | | | | | | |
Debt instrument interest rate | | | 11.00% | 11.00% | 11.00% | | | | | | | | |
Frost Gamma Investment Trust [Member] | 2016 Promissory Note [Member] | | | | | | | | | | | | | |
Short-term Debt [Line Items] | | | | | | | | | | | | | |
Beneficial ownership percentage | | 10.00% | | | | | | | | | | | |
Aggregate principal amount | | $ 100 | | | | | | | | | | | |
Debt instrument maturity date | | Jul. 31, 2018 | | | | | | | | | | | |
Debt instrument interest rate | | 11.00% | | | | | | | | | | | |
Hsu Gamma Investments L P [Member] | 2012 Promissory Note [Member] | | | | | | | | | | | | | |
Short-term Debt [Line Items] | | | | | | | | | | | | | |
Aggregate principal amount | | | | | | | | | $ 50 | | | | |
Debt instrument maturity date | | | | | | | | | Jul. 31, 2018 | | | | |
Debt instrument interest rate | | | | | | | | | 11.00% | | | | |
Jane Hsiao [Member] | 2013 Promissory Note [Member] | | | | | | | | | | | | | |
Short-term Debt [Line Items] | | | | | | | | | | | | | |
Aggregate principal amount | | | | | | | | $ 50 | | | | | |
Debt instrument maturity date | | | | | | | | Jul. 31, 2018 | | | | | |
Debt instrument interest rate | | | | | | | | 11.00% | | | | | |
Jane Hsiao [Member] | 2014 Promissory Note [Member] | | | | | | | | | | | | | |
Short-term Debt [Line Items] | | | | | | | | | | | | | |
Aggregate principal amount | | | | | | | $ 50 | | | | | | |
Debt instrument maturity date | | | | | | | Jul. 31, 2018 | | | | | | |
Debt instrument interest rate | | | | | | | 11.00% | | | | | | |
Jane Hsiao [Member] | 2015 Promissory Note [Member] | | | | | | | | | | | | | |
Short-term Debt [Line Items] | | | | | | | | | | | | | |
Aggregate principal amount | | | $ 50 | | | $ 50 | | | | | | | |
Debt instrument maturity date | | | Jul. 31, 2018 | | | Jul. 31, 2018 | | | | | | | |
Debt instrument interest rate | | | 11.00% | | | 11.00% | | | | | | | |
Hsu Gamma [Member] | 2016 Promissory Note [Member] | | | | | | | | | | | | | |
Short-term Debt [Line Items] | | | | | | | | | | | | | |
Aggregate principal amount | | $ 100 | | | | | | | | | | | |
Debt instrument maturity date | | Jul. 31, 2018 | | | | | | | | | | | |
Debt instrument interest rate | | 11.00% | | | | | | | | | | | |
Hsu Gamma [Member] | 2017 Promissory Notes [Member] | | | | | | | | | | | | | |
Short-term Debt [Line Items] | | | | | | | | | | | | | |
Aggregate principal amount | $ 50 | | | | | | | | | | | | |
Debt instrument maturity date | Jul. 31, 2018 | | | | | | | | | | | | |
Debt instrument interest rate | 11.00% | | | | | | | | | | | | |
Hsu Gamma [Member] | 2017 Promissory Notes [Member] | September 22, 2017 [Member] | | | | | | | | | | | | | |
Short-term Debt [Line Items] | | | | | | | | | | | | | |
Aggregate principal amount | | | | | | | | | | | | $ 50 | |
Debt instrument maturity date | | | | | | | | | | | | Jul. 31, 2018 | |
Debt instrument interest rate | | | | | | | | | | | | 11.00% | |
Frost Gamma [Member] | 2017 Promissory Notes [Member] | | | | | | | | | | | | | |
Short-term Debt [Line Items] | | | | | | | | | | | | | |
Beneficial ownership percentage | 10.00% | | | | | | | | | | | | |
Aggregate principal amount | $ 50 | | | | | | | | | | | | |
Debt instrument maturity date | Jul. 31, 2018 | | | | | | | | | | | | |
Debt instrument interest rate | 11.00% | | | | | | | | | | | | |
Frost Gamma [Member] | 2017 Promissory Notes [Member] | September 22, 2017 [Member] | | | | | | | | | | | | | |
Short-term Debt [Line Items] | | | | | | | | | | | | | |
Beneficial ownership percentage | | | | | | | | | | | | 10.00% | |
Aggregate principal amount | | | | | | | | | | | | $ 50 | |
Debt instrument maturity date | | | | | | | | | | | | Jul. 31, 2018 | |
Debt instrument interest rate | | | | | | | | | | | | 11.00% | |
2010 Credit Facility [Member] | Frost Gamma and Hsu Gamma [Member] | | | | | | | | | | | | | |
Short-term Debt [Line Items] | | | | | | | | | | | | | |
Beneficial ownership percentage | | | | | | | | | | | 10.00% | | |
Aggregate principal amount | | | | | | | | | | | $ 1,000 | | |
Debt instrument maturity date | | | | | | | | | | | Jul. 31, 2018 | | |
Debt instrument interest rate | | | | | | | | | | | 11.00% | | |
2010 Credit Facility [Member] | Frost Gamma and Hsu Gamma [Member] | Maximum [Member] | | | | | | | | | | | | | |
Short-term Debt [Line Items] | | | | | | | | | | | | | |
Debt instrument interest rate | | | | | | | | | | | 16.00% | | |
Credit Facility [Member] | | | | | | | | | | | | | |
Short-term Debt [Line Items] | | | | | | | | | | | | | |
Line of credit facility outstanding | | | | | | | | | | | | $ 1,000 | $ 1,000 |