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Nature of Operations (Narrative) (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2015
USD ($)
Schedule of Equity Method Investments [Line Items]  
Ownership percentage 47.87%
Cash paid to settle obligation $ 50
Shares issued to repay obligation 375
Printar [Member]  
Schedule of Equity Method Investments [Line Items]  
Conditional obligation 2,000
Total repayment 425
Cash paid to settle obligation 50
Shares issued to repay obligation $ 375