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Note 10 - Operating Segments - Segment Financial Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Interest expense-financing fees |  | $ (9,000) | $ (29,000) |  | $ (18,000) | $ (85,000) |
Depreciation and amortization |  | 1,133,000 | 912,000 |  | 2,288,000 | 1,796,000 |
Segment income (loss) before income taxes |  | (1,160,000) | (11,301,000) |  | (1,754,000) | (15,110,000) |
Income tax expense (benefit) |  | 66,000 | (3,167,000) |  | 147,000 | (3,130,000) |
Segment income (loss) |  | (1,226,000) | (8,134,000) |  | (1,901,000) | (11,980,000) |
Expenditures for segment assets |  | 94,000 | 20,000 |  | 116,000 | 28,000 |
Revenue from external customers |  | 12,715,000 | 14,809,000 |  | 25,422,000 | 24,847,000 |
Intercompany revenues |  |  |  |  |  |  |
Gross profit |  | 2,354,000 | 1,816,000 |  | 5,073,000 | 1,850,000 |
Research and development |  | 619,000 | 554,000 |  | 1,008,000 | 1,128,000 |
Interest income |  | 36,000 | 31,000 |  | 71,000 | 47,000 |
Interest expense |  | (90,000) | (108,000) |  | (189,000) | (276,000) |
Treatment [Member] |  |  |  |  |  |  |
Interest expense-financing fees |  |  |  |  |  |  |
Depreciation and amortization |  | 988,000 | 705,000 |  | 1,997,000 | 1,418,000 |
Segment income (loss) before income taxes |  | 1,238,000 | (10,557,000) | [1] | 2,840,000 | (11,805,000) | [1]
Income tax expense (benefit) |  | 65,000 | (3,167,000) | [1] | 145,000 | (3,130,000) | [1]
Segment income (loss) |  | 1,173,000 | (7,390,000) |  | 2,695,000 | (8,675,000) |
Expenditures for segment assets |  | 91,000 | 16,000 |  | 106,000 | 23,000 |
Revenue from external customers |  | 9,630,000 | 7,985,000 |  | 19,665,000 | 15,189,000 |
Intercompany revenues |  | 97,000 | 6,000 |  | 113,000 | 10,000 |
Gross profit |  | 2,174,000 | 582,000 |  | 4,861,000 | 444,000 |
Research and development |  | 62,000 | 120,000 |  | 243,000 | 226,000 |
Interest income |  |  | 2,000 |  |  | 2,000 |
Interest expense |  | (18,000) | (14,000) |  | (26,000) | (16,000) |
Services [Member] |  |  |  |  |  |  |
Interest expense-financing fees |  |  |  |  |  |  |
Depreciation and amortization |  | 135,000 | 160,000 |  | 271,000 | 321,000 |
Segment income (loss) before income taxes |  | (553,000) | 1,046,000 |  | (1,260,000) | 322,000 |
Income tax expense (benefit) |  |  |  |  |  |  |
Segment income (loss) |  | (553,000) | 1,046,000 |  | (1,260,000) | 322,000 |
Expenditures for segment assets |  | 3,000 | 4,000 |  | 10,000 | 4,000 |
Revenue from external customers |  | 3,085,000 | 6,824,000 |  | 5,757,000 | 9,658,000 |
Intercompany revenues |  | 7,000 | 10,000 |  | 10,000 | 15,000 |
Gross profit |  | 180,000 | 1,234,000 |  | 212,000 | 1,406,000 |
Research and development |  |  | 7,000 |  |  | 33,000 |
Interest income |  |  |  |  |  |  |
Interest expense |  |  |  |  | (1,000) |  |
Medical [Member] |  |  |  |  |  |  |
Interest expense-financing fees |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |
Segment income (loss) before income taxes |  | (550,000) | (416,000) |  | (750,000) | (854,000) |
Income tax expense (benefit) |  |  |  |  |  |  |
Segment income (loss) |  | (550,000) | (416,000) |  | (750,000) | (854,000) |
Expenditures for segment assets |  |  |  |  |  | 1,000 |
Revenue from external customers |  |  |  |  |  |  |
Intercompany revenues |  |  |  |  |  |  |
Gross profit |  |  |  |  |  |  |
Research and development |  | 550,000 | 416,000 |  | 750,000 | 854,000 |
Interest income |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |
Segments Total [Member] |  |  |  |  |  |  |
Interest expense-financing fees |  |  |  |  |  |  |
Depreciation and amortization |  | 1,123,000 | 865,000 |  | 2,268,000 | 1,739,000 |
Segment income (loss) before income taxes |  | 135,000 | (9,927,000) |  | 830,000 | (12,337,000) |
Income tax expense (benefit) |  | 65,000 | (3,167,000) |  | 145,000 | (3,130,000) |
Segment income (loss) |  | 70,000 | (6,760,000) |  | 685,000 | (9,207,000) |
Expenditures for segment assets |  | 94,000 | 20,000 |  | 116,000 | 28,000 |
Revenue from external customers |  | 12,715,000 | 14,809,000 |  | 25,422,000 | 24,847,000 |
Intercompany revenues |  | 104,000 | 16,000 |  | 123,000 | 25,000 |
Gross profit |  | 2,354,000 | 1,816,000 |  | 5,073,000 | 1,850,000 |
Research and development |  | 612,000 | 543,000 |  | 993,000 | 1,113,000 |
Interest income |  |  | 2,000 |  |  | 2,000 |
Interest expense |  | (18,000) | (14,000) |  | (27,000) | (16,000) |
Corporate and Other [Member] |  |  |  |  |  |  |
Interest expense-financing fees | [2] | (9,000) | (29,000) |  | (18,000) | (85,000) |
Depreciation and amortization | [2] | 10,000 | 47,000 |  | 20,000 | 57,000 |
Segment income (loss) before income taxes | [2] | (1,295,000) | (1,374,000) |  | (2,584,000) | (2,773,000) |
Income tax expense (benefit) | [2] | 1,000 |  |  | 2,000 |  |
Segment income (loss) | [2] | (1,296,000) | (1,374,000) |  | (2,586,000) | (2,773,000) |
Expenditures for segment assets | [2] |  |  |  |  |  |
Revenue from external customers | [2] |  |  |  |  |  |
Intercompany revenues | [2] |  |  |  |  |  |
Gross profit | [2] |  |  |  |  |  |
Research and development | [2] | 7,000 | 11,000 |  | 15,000 | 15,000 |
Interest income | [2] | 36,000 | 29,000 |  | 71,000 | 45,000 |
Interest expense | [2] | $ (72,000) | $ (94,000) |  | $ (162,000) | $ (260,000) |
[1] | Amounts include tangible and intangible asset impairment losses of $1,816,000 and $8,288,000, respectively for the Company's M&EC subsidiary. Also includes a tax benefit of approximately $3,203,000 recorded resulting from the intangible impairment loss recorded for our M&EC subsidiary.
[2] | Amounts reflect the activity for corporate headquarters not included in the segment information.

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