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Operating Segments - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Revenue from external customers |  | $ 12,658 | $ 12,707
Intercompany revenues |  |  |
Gross profit |  | 3,321 | 2,719
Research and development |  | 232 | 389
Interest income |  | 49 | 35
Interest expense |  | (53) | (100)
Interest expense-financing fees |  | (9) | (9)
Depreciation and amortization |  | 372 | 1,155
Segment income (loss) before income taxes |  | 304 | (594)
Income tax expense |  | (51) | (81)
Segment income (loss) |  | 253 | (675)
Expenditures for segment assets |  | 248 | 22
Treatment [Member] |  |  |
Revenue from external customers |  | 8,959 | 10,034
Intercompany revenues |  | 213 | 16
Gross profit |  | 2,780 | 2,687
Research and development |  | 114 | 181
Interest income |  |  |
Interest expense |  |  | (8)
Interest expense-financing fees |  |  |
Depreciation and amortization |  | 240 | 1,009
Segment income (loss) before income taxes |  | 1,744 | 1,602
Income tax expense |  | (51) | (80)
Segment income (loss) |  | 1,693 | 1,522
Expenditures for segment assets |  | 220 | 15
Services [Member] |  |  |
Revenue from external customers |  | 3,699 | 2,673
Intercompany revenues |  | 14 | 3
Gross profit |  | 541 | 32
Research and development |  |  |
Interest income |  |  |
Interest expense |  | (1) | (1)
Interest expense-financing fees |  |  |
Depreciation and amortization |  | 123 | 136
Segment income (loss) before income taxes |  | (86) | (707)
Income tax expense |  |  |
Segment income (loss) |  | (86) | (707)
Expenditures for segment assets |  | 25 | 7
Medical [Member] |  |  |
Revenue from external customers |  |  |
Intercompany revenues |  |  |
Gross profit |  |  |
Research and development |  | 100 | 200
Interest income |  |  |
Interest expense |  |  |
Interest expense-financing fees |  |  |
Depreciation and amortization |  |  |
Segment income (loss) before income taxes |  | (100) | (200)
Income tax expense |  |  |
Segment income (loss) |  | (100) | (200)
Expenditures for segment assets |  |  |
Segments Total [Member] |  |  |
Revenue from external customers |  | 12,658 | 12,707
Intercompany revenues |  | 227 | 19
Gross profit |  | 3,321 | 2,719
Research and development |  | 214 | 381
Interest income |  |  |
Interest expense |  | (1) | (9)
Interest expense-financing fees |  |  |
Depreciation and amortization |  | 363 | 1,145
Segment income (loss) before income taxes |  | 1,558 | 695
Income tax expense |  | (51) | (80)
Segment income (loss) |  | 1,507 | 615
Expenditures for segment assets |  | 245 | 22
Corporate [Member] |  |  |
Revenue from external customers | [1] |  |
Intercompany revenues | [1] |  |
Gross profit | [1] |  |
Research and development | [1] | 18 | 8
Interest income | [1] | 49 | 35
Interest expense | [1] | (52) | (91)
Interest expense-financing fees | [1] | (9) | (9)
Depreciation and amortization | [1] | 9 | 10
Segment income (loss) before income taxes | [1] | (1,254) | (1,289)
Income tax expense | [1] |  | (1)
Segment income (loss) | [1] | (1,254) | (1,290)
Expenditures for segment assets | [1] | $ 3 |
[1] | Amounts reflect the activity for corporate headquarters not included in the segment information.

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