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Note 16 - Segment Financial Information (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
Treatment [Member] |  |  |  |  |
Revenue, Net |  | $ 41,318,000 |  | $ 42,343,000 |
Intercompany revenues |  | 113,000 |  | 12,000 |
Gross profit |  | 10,910,000 |  | 10,480,000 |
Research and Development Expense |  | 179,000 |  | $ 437,000 |
Interest income |  | 6,000 |  |  |
Interest expense |  | (38,000) |  | $ (38,000) |
Interest expense-financing fees |  | (2,000) |  |  |
Depreciation and amortization |  | 2,949,000 |  | $ 3,281,000 |
Segment income (loss) before income taxes |  | 7,101,000 |  | 6,149,000 |
Total income tax expense |  | 538,000 |  | 604,000 |
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest |  | 6,563,000 |  | 5,545,000 |
Segment assets | [1] | 46,307,000 |  | 50,226,000 |
Expenditures for segment assets |  | 579,000 |  | 399,000 |
Total debt |  | 23,000 |  | 47,000 |
Services [Member] |  |  |  |  |
Revenue, Net |  | 21,065,000 |  | 14,722,000 |
Intercompany revenues |  | 25,000 |  | 70,000 |
Gross profit |  | $ 3,441,000 |  | 1,428,000 |
Research and Development Expense |  |  |  | $ 99,000 |
Interest income |  |  |  |  |
Interest expense |  |  |  | $ (1,000) |
Interest expense-financing fees |  |  |  | 2,000 |
Depreciation and amortization |  | $ 725,000 |  | 910,000 |
Segment income (loss) before income taxes |  | $ 1,178,000 |  | (2,184,000) | [2]
Total income tax expense |  |  |  | (191,000) |
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest |  | $ 1,178,000 |  | (1,993,000) | [2]
Segment assets | [1] | 9,481,000 |  | 8,920,000 |
Expenditures for segment assets |  | $ 33,000 |  | $ 64,000 |
Total debt |  |  |  |  |
Medical [Member] |  |  |  |  |
Revenue, Net |  |  |  |  |
Intercompany revenues |  |  |  |  |
Gross profit |  |  |  |  |
Research and Development Expense |  | $ 2,114,000 |  | $ 759,000 |
Interest income |  |  |  |  |
Interest expense |  |  |  |  |
Interest expense-financing fees |  |  |  |  |
Depreciation and amortization |  |  |  |  |
Segment income (loss) before income taxes |  | $ (2,114,000) |  | $ (759,000) |
Total income tax expense |  |  |  |  |
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest |  | $ (2,114,000) |  | $ (759,000) |
Segment assets | [1] | $ 1,793,000 |  | $ 1,213,000 |
Expenditures for segment assets |  |  |  |  |
Total debt |  |  |  |  |
Segments Total [Member] |  |  |  |  |
Revenue, Net | [3] | $ 62,383,000 |  | $ 57,065,000 |
Intercompany revenues | [3] | 138,000 |  | 82,000 |
Gross profit | [3] | 14,351,000 |  | 11,908,000 |
Research and Development Expense | [3] | 2,293,000 |  | $ 1,295,000 |
Interest income |  | 6,000 | [3] |  |
Interest expense | [3] | (38,000) |  | $ (39,000) |
Interest expense-financing fees | [3] | (2,000) |  | 2,000 |
Depreciation and amortization | [3] | 3,674,000 |  | 4,191,000 |
Segment income (loss) before income taxes | [3] | 6,165,000 |  | 3,206,000 |
Total income tax expense | [3] | 538,000 |  | 413,000 |
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest | [3] | 5,627,000 |  | 2,793,000 |
Segment assets | [1],[3] | 57,581,000 |  | 60,359,000 |
Expenditures for segment assets | [3] | 612,000 |  | 463,000 |
Total debt | [3] | $ 23,000 |  | $ 47,000 |
Corporate Segment [Member] |  |  |  |  |
Revenue, Net |  |  |  |  |
Intercompany revenues |  |  |  |  |
Gross profit |  |  |  |  |
Research and Development Expense | [4] | $ 9,000 |  | $ 20,000 |
Interest income | [4] | 47,000 |  | 27,000 |
Interest expense | [4] | (451,000) |  | (577,000) |
Interest expense-financing fees | [4] | (226,000) |  | (194,000) |
Depreciation and amortization | [4] | 43,000 |  | 49,000 |
Segment income (loss) before income taxes | [4] | (5,685,000) |  | (5,781,000) |
Total income tax expense | [4] | 5,000 |  | 4,000 |
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest | [4] | (5,690,000) |  | (5,785,000) |
Segment assets | [1],[5] | 25,484,000 | [4] | 27,892,000 |
Expenditures for segment assets | [4] | 11,000 |  | 1,000 |
Total debt | [4],[6] | 9,965,000 |  | 11,325,000 |
Revenue, Net |  | $ 62,383,000 |  | $ 57,065,000 |
Intercompany revenues |  |  |  |  |
Gross profit |  | $ 14,351,000 |  | $ 11,908,000 |
Research and Development Expense |  | 2,302,000 |  | 1,315,000 |
Interest income |  | 53,000 |  | 27,000 |
Interest expense |  | (489,000) |  | (616,000) |
Interest expense-financing fees |  | (228,000) |  | (192,000) |
Depreciation and amortization |  | 3,717,000 |  | 4,240,000 |
Segment income (loss) before income taxes |  | 480,000 |  | (2,575,000) |
Total income tax expense |  | 543,000 |  | 417,000 |
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest |  | (63,000) |  | (2,992,000) |
Segment assets | [1] | 83,065,000 |  | 88,251,000 |
Expenditures for segment assets |  | 623,000 |  | 464,000 |
Total debt |  | $ 9,988,000 |  | $ 11,372,000 |
[1] | Segment assets have been adjusted for intercompany accounts to reflect actual assets for each segment.
[2] | Included goodwill impairment charge of $380,000 recorded for the Company's SYA subsidiary which was divested on July 29, 2014.
[3] | The Company performed services relating to waste generated by the federal government, either directly as a prime contractor or indirectly as a subcontractor to the federal government, representing approximately $36,105,000 or 57.9% of total revenue from continuing operations during 2015 and $34,780,000 or 60.9% of total revenue from continuing operations during 2014.
[4] | Amounts reflect the activity for corporate headquarters not included in the segment information.
[5] | Amount includes assets from our discontinued operations of $565,000 and $701,000, as of December 31, 2015 and 2014, respectively.
[6] | Net of debt discount of ($50,000) and ($137,000) for 2015 and 2014, respectively, based on the estimated fair value at issuance of two Warrants and 90,000 shares of the Company's Common Stock issued on August 2, 2013 in connection with a $3,000,000 promissory note entered into by the Company and Messrs. William Lampson and Robert L. Ferguson. See Note 9 – "Long-Term Debt – Promissory Note and Installment Agreement" for additional information.

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