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Inventories | 6 Months Ended
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Jun. 30, 2014
Inventories [Abstract] |
Inventory Disclosure [Text Block] | Inventories Inventories, primarily representing work in process for costs incurred on projects at PCT that have not been completed, were $2.0 million and $1.3 million as of June 30, 2014 and December 31, 2013, respectively. The Company also has deferred revenue of approximately $2.4 million and $1.5 million of advance billings received as of June 30, 2014 and December 31, 2013, respectively, related to these contracts.

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