| Schedule of Segment Reporting Information, by Segment [Table Text Block] | 
|  |  | 
            Treatment
           |  |  | 
            Services
           |  |  | 
            Segments Total
           |  |  | 
            Corporate
           
            And Other
           | (2) |  | 
            Consolidated
           
            Total
           |  |  
| 
            Revenue from external customers
           |  | $ | 42,343 |  |  | $ | 14,722 |  |  | $ | 57,065 | (3) |  | $ | — |  |  | $ | 57,065 |  |  
| 
            Intercompany revenues
           |  |  | 12 |  |  |  | 70 |  |  |  | 82 |  |  |  | — |  |  |  | — |  |  
| 
            Gross profit
           |  |  | 10,480 |  |  |  | 1,428 |  |  |  | 11,908 |  |  |  | — |  |  |  | 11,908 |  |  
| 
            Interest income
           |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 27 |  |  |  | 27 |  |  
| 
            Interest expense
           |  |  | 38 |  |  |  | 1 |  |  |  | 39 |  |  |  | 577 |  |  |  | 616 |  |  
| 
            Interest expense-financing fees
           |  |  | — |  |  |  | (2 | ) |  |  | (2 | ) |  |  | 194 |  |  |  | 192 |  |  
| 
            Depreciation and amortization
           |  |  | 3,281 |  |  |  | 910 |  |  |  | 4,191 |  |  |  | 49 |  |  |  | 4,240 |  |  
| 
            Segment income (loss)
           |  |  | 5,545 |  |  |  | (1,993 | )(6) |  |  | 3,552 |  |  |  | (6,544 | ) |  |  | (2,992 | ) |  
| 
            Segment assets(1)
           |  |  | 50,226 |  |  |  | 8,920 |  |  |  | 59,146 |  |  |  | 29,490 | (4) |  |  | 88,636 |  |  
| 
            Expenditures for segment assets
           |  |  | 399 |  |  |  | 64 |  |  |  | 463 |  |  |  | 1 |  |  |  | 464 |  |  
| 
            Total debt
           |  |  | 47 |  |  |  | — |  |  |  | 47 |  |  |  | 11,325 | (5) |  |  | 11,372 |  |  
|  |  | 
            Treatment
           |  |  | 
            Services
           |  |  | 
            Segments Total
           |  |  | 
            Corporate
           
            And Other
           | (2) |  | 
            Consolidated
           
            Total
           |  |  
| 
            Revenue from external customers
           |  | $ | 35,540 |  |  | $ | 38,873 |  |  | $ | 74,413 | (3) |  | $ | — |  |  | $ | 74,413 |  |  
| 
            Intercompany revenues
           |  |  | 1,179 |  |  |  | 77 |  |  |  | 1,256 |  |  |  | — |  |  |  | — |  |  
| 
            Gross profit
           |  |  | 5,574 |  |  |  | 4,242 |  |  |  | 9,816 |  |  |  | — |  |  |  | 9,816 |  |  
| 
            Interest income
           |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 35 |  |  |  | 35 |  |  
| 
            Interest expense
           |  |  | 42 |  |  |  | (3 | ) |  |  | 39 |  |  |  | 723 |  |  |  | 762 |  |  
| 
            Interest expense-financing fees
           |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 132 |  |  |  | 132 |  |  
| 
            Depreciation and amortization
           |  |  | 3,045 |  |  |  | 990 |  |  |  | 4,035 |  |  |  | 91 |  |  |  | 4,126 |  |  
| 
            Segment loss
           |  |  | (8,198 | )(6) |  |  | (20,042 | )(6) |  |  | (28,240 | ) |  |  | (6,231 | ) |  |  | (34,471 | ) |  
| 
            Segment assets(1) (Revised)
           |  |  | 49,978 |  |  |  | 11,951 |  |  |  | 61,929 |  |  |  | 30,131 | (4) |  |  | 92,060 |  |  
| 
            Expenditures for segment assets
           |  |  | 477 |  |  |  | 466 |  |  |  | 943 |  |  |  | 1 |  |  |  | 944 |  |  
| 
            Total debt
           |  |  | 106 |  |  |  | — |  |  |  | 106 |  |  |  | 14,142 | (5) |  |  | 14,248 |  |  | 
| Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block] | 
|  |  | 
            USEC
           |  |  | 
            CHPRC
           |  |  
|  |  | 
            2014
           |  |  | 
            2013
           |  |  | 
            2014
           |  |  | 
            2013
           |  |  
| 
            Treatment
           |  | $ | 9,309,000 |  |  | $ | 2,037,000 |  |  | $ | 5,594,000 |  |  | $ | 2,268,000 |  |  
| 
            Services
           |  |  | 963,000 |  |  |  | — |  |  |  | 168,000 |  |  |  | 17,654,000 |  |  
| 
            Total
           |  | $ | 10,272,000 |  |  | $ | 2,037,000 |  |  | $ | 5,762,000 |  |  | $ | 19,922,000 |  |  |