Note 5 - Permit and Other Intangible Assets - Changes in the Carrying Amount of Permits (Details) - USD ($) |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
|||
| Intangible assets amortized | $ (448,000) | $ (471,000) | ||
| Permit impairment for M&EC subsidiary | (8,288,000) | |||
| Permits [Member] | ||||
| Balance | 16,761,000 | 16,709,000 | ||
| Intangible assets amortized | [1] | (55,000) | (55,000) | |
| Permit in progress | 56,000 | 107,000 | ||
| Balance | 8,474,000 | $ 16,761,000 | ||
| Permit impairment for M&EC subsidiary | $ (8,288,000) | |||
| ||||
| X | ||||||||||
- Definition Costs associated with permits in progress. No definition available.
|
| X | ||||||||||
- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|