Fair Value Measurements - Hierarchy Levels (Details) - Recurring basis - USD ($)
|
Oct. 31, 2016 |
Jul. 31, 2016 |
| Assets: |
|
|
| Total assets |
$ 740,000
|
$ 740,000
|
| Liabilities: |
|
|
| Total liabilities |
1,487,000
|
1,579,000
|
| Accrued expenses |
|
|
| Liabilities: |
|
|
| Assumed contingent obligation |
12,000
|
12,000
|
| Contingent guaranteed obligation |
309,000
|
366,000
|
| Total accrued expenses |
321,000
|
378,000
|
| Other long-term liabilities |
|
|
| Liabilities: |
|
|
| Assumed contingent obligation |
1,126,000
|
1,126,000
|
| Contingent guaranteed obligation |
40,000
|
75,000
|
| Total other long-term liabilities |
1,166,000
|
1,201,000
|
| Money markets | Cash and cash equivalents |
|
|
| Assets: |
|
|
| Money markets |
740,000
|
740,000
|
| Level 1 |
|
|
| Assets: |
|
|
| Total assets |
740,000
|
740,000
|
| Level 1 | Money markets | Cash and cash equivalents |
|
|
| Assets: |
|
|
| Money markets |
740,000
|
740,000
|
| Level 3 |
|
|
| Liabilities: |
|
|
| Total liabilities |
1,487,000
|
1,579,000
|
| Level 3 | Accrued expenses |
|
|
| Liabilities: |
|
|
| Assumed contingent obligation |
12,000
|
12,000
|
| Contingent guaranteed obligation |
309,000
|
366,000
|
| Total accrued expenses |
321,000
|
378,000
|
| Level 3 | Other long-term liabilities |
|
|
| Liabilities: |
|
|
| Assumed contingent obligation |
1,126,000
|
1,126,000
|
| Contingent guaranteed obligation |
40,000
|
75,000
|
| Total other long-term liabilities |
$ 1,166,000
|
$ 1,201,000
|