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Debt (Narrative) (Details) $ in Thousands, € in Millions |  |  |  |  |  | 1 Months Ended | 3 Months Ended |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 05, 2015 USD ($) | Jun. 01, 2014 | Apr. 22, 2014 USD ($) | Jul. 31, 2013 | Mar. 05, 2007 USD ($) | Mar. 31, 2016 USD ($) item | Dec. 31, 2015 USD ($) | Dec. 31, 2015 EUR (€) | Jan. 31, 2015 USD ($) item | Dec. 31, 2014 USD ($) | Dec. 31, 2014 EUR (€) | Apr. 30, 2014 USD ($) | Mar. 31, 2013 | Mar. 31, 2016 USD ($) item | Apr. 30, 2016 USD ($) | Mar. 31, 2016 EUR (€) item | Jan. 31, 2016 USD ($) building | Jan. 31, 2015 EUR (€) item | Apr. 30, 2014 EUR (€) | Jul. 05, 2013 USD ($) | Mar. 15, 2013 USD ($) | Apr. 10, 2012 USD ($) | Mar. 31, 2012 USD ($) | Mar. 05, 2012 USD ($) | Dec. 31, 2010 USD ($) item | Sep. 15, 2006 USD ($)
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt and Capital Lease Obligations |  |  |  |  |  | $ 29,092 | $ 30,165 |  |  |  |  |  |  | $ 29,092 |  |  |  |  |  |  |  |  |  |  |  |
Payment to Acquire Business, Gross |  |  |  |  |  | 4,000 |  |  |  |  |  |  |  | 4,761 |  |  |  |  |  |  |  |  |  |  |  |
Mortgage Payable - Due September 2016 | East West Bank |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long Term Debt |  |  |  |  |  | 2,192 | 2,211 |  |  |  |  |  |  | 2,192 |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility - Due September 2017 | East West Bank | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  | 15,000 |  |  |  |  |  |  |  | 15,000 |  |  |  |  |  |  |  |  | $ 10,000 |  |  |
Long-term Line of Credit |  |  |  |  |  | 0 |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |
Mortgage Payable - Due February 2021 | East West Bank |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,700 |  |  |  |  |  |  |  | $ 4,500 |
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid |  |  |  |  |  | 3,300 |  |  |  |  |  |  |  | 3,300 |  |  |  |  |  |  |  |  |  |  | $ 3,800 |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.39% |  |  |  |  |  |  |  |  |
Unrealized loss |  |  |  |  |  |  |  |  |  |  |  |  |  | (100) |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Fair Value Disclosure |  |  |  |  |  | 3,700 |  |  |  |  |  |  |  | 3,700 |  |  |  |  |  |  |  |  |  |  |  |
Long Term Debt |  |  |  |  |  | 3,718 | 3,725 |  |  |  |  |  |  | 3,718 |  |  |  |  |  |  |  |  |  |  |  |
Equipment Loan - Due April 2017 | East West Bank |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,900 |  |  |  |  |
Line Of Credit Replaced By Equipment Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8,000 |  |
Long Term Debt |  |  |  |  |  | 1,387 | 1,700 |  |  |  |  |  |  | 1,387 |  |  |  |  |  |  |  |  |  |  |  |
Equipment Loan - Due April 2017 | East West Bank | Prime Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  |  |  |  |  | 0.25% |  |  |  |  |  |  |  |  |  |  |  |  |
Equipment Loan Due January 2019 | East West Bank |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.48% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured debt |  |  |  |  |  | 4,400 |  |  |  |  |  |  |  | 4,400 |  |  |  |  |  |  |  |  |  |  |  |
Line Of Credit Replaced By Equipment Loan | $ 6,200 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long Term Debt |  |  |  |  |  | 4,363 | 4,748 |  |  |  |  |  |  | 4,363 |  |  |  |  |  |  |  |  |  |  |  |
Equipment Loan Due January 2019 | East West Bank | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8,000 |  |  |  |  |  |
Proceeds from borrowing under lines of credit | $ 6,200 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equipment Loan Due January 2019 | East West Bank | Prime Rate | Line of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  | 0.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equipment Credit Line Due September 2021 | East West Bank |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  | $ 5,000 |  |  |  |  |  |  |  | 5,000 |  |  |  |  |  |  |  |  |  |  |  |
Draw down period, in months |  |  |  |  |  | 18 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term of loan after draw down period expires, in months |  |  |  |  |  | 48 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equipment Credit Line Due September 2021 | East West Bank | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term Line of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,900 |  |  |  |  |  |  |  |  |  |  |
Mortgage Payable - Due April 2021 | Cathay Bank |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid |  |  |  |  |  | $ 3,900 |  |  |  |  |  |  |  | $ 3,900 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 5.42% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Frequency of Periodic Payment |  |  |  |  |  |  |  |  |  |  |  |  |  | monthly |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Fair Value Disclosure |  |  |  |  |  | 4,800 |  |  |  |  |  |  |  | $ 4,800 |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt, Gross |  |  |  |  |  | 4,400 |  |  |  |  |  |  |  | 4,400 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Replaced By Mortgage Loan |  |  |  |  | $ 5,300 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long Term Debt |  |  |  |  |  | 4,437 | 4,460 |  |  |  |  |  |  | 4,437 |  |  |  |  |  |  |  |  |  |  |  |
Mortgage Payable - Due April 2021 | Cathay Bank | Scenario, Refinanced |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  | $ 4,600 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility - Due May 2016 | Cathay Bank | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 20,000 |  |  |  |
Long-term Line of Credit |  |  |  |  |  | 0 |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |
Acquisition Loan - Due April 2019 | Cathay Bank |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  | $ 21,900 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid |  |  |  |  |  | 12,000 |  |  |  |  |  |  |  | $ 12,000 |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Term |  | 120 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Loan Collateral Percentage |  |  | 65.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument Covenant Period To Discharge Final Judgment |  |  |  |  |  |  |  |  |  |  |  |  |  | 30 days |  |  |  |  |  |  |  |  |  |  |  |
Long Term Debt |  |  |  |  |  | 18,535 | 19,012 |  |  |  |  |  |  | $ 18,535 |  |  |  |  |  |  |  |  |  |  |  |
French Government Loans | Seine-Normandie Water Agency |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  |  |  | $ 700 |  |  |  |  |  |  |  |  | € 0.6 |  |  |  |  |  |  |  |
Number of Loans with Government Agency | item |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |
Debt Instrument, Periodic Payment, Interest |  |  |  |  |  |  |  |  | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notes Payable |  |  |  |  |  | 500 |  |  |  |  |  |  |  | 500 |  | € 0.5 |  |  |  |  |  |  |  |  |  |
Note Payable To Merck |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  |  |  |  |  |  | $ 16,000 |  |  |  |  |  |  | € 11.6 |  |  |  |  |  |  |
Debt Instrument, Term |  |  |  |  |  |  |  |  |  |  |  | 4 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment to Acquire Business, Gross |  |  |  |  |  |  | 3,500 | € 3.2 |  | $ 6,000 | € 4.9 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long Term Debt |  |  |  |  |  | 4,119 | 3,942 |  |  |  |  |  |  | 4,119 |  | € 3.6 |  |  |  |  |  |  |  |  |  |
Capital Lease Obligations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Leased Assets, Gross |  |  |  |  |  | 1,700 | 1,500 |  |  |  |  |  |  | 1,700 |  |  |  |  |  |  |  |  |  |  |  |
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation |  |  |  |  |  | $ 800 | $ 700 |  |  |  |  |  |  | $ 800 |  |  |  |  |  |  |  |  |  |  |  |
Minimum | Mortgage Payable - Due February 2021 | East West Bank |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.00% |
Minimum | Equipment Loan - Due April 2017 | East West Bank |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  | 3.50% |  |  |  |  |  |  |  | 3.50% |  | 3.50% |  |  |  |  |  |  |  |  |  |
Minimum | Line of Credit Facility - Due May 2016 | Cathay Bank | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.00% |  |  |  |
Minimum | Acquisition Loan - Due April 2019 | Cathay Bank |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  | 4.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum | French Government Loans | Seine-Normandie Water Agency |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  | 4.00% |  |  |  |  |  |  |  | 4.00% |  | 4.00% |  |  |  |  |  |  |  |  |  |
Debt Instrument, Term |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum | Note Payable To Merck |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  | 4.00% |  |  |  |  |  | 3.00% |  | 4.00% |  | 4.00% |  |  | 3.00% |  |  |  |  |  |  |
Maximum | French Government Loans | Seine-Normandie Water Agency |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Term |  |  |  |  |  |  |  |  | 6 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rancho Cucamonga | Mortgage Payable - Due September 2016 | East West Bank |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,800
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid |  |  |  |  |  | $ 2,200 |  |  |  |  |  |  |  | $ 2,200 |  |  |  |  |  |  |  |  |  |  |  |
Number of Buildings Securing Loan | item |  |  |  |  |  | 1 |  |  |  |  |  |  |  | 1 |  | 1 |  |  |  |  |  |  |  |  |  |
Rancho Cucamonga | Mortgage Payable - Due September 2016 | East West Bank | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.50% |  |  |  |  |  |  |  |  |  |  |  |
Rancho Cucamonga | Mortgage Payable - Due February 2021 | East West Bank |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Buildings Securing Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  | 1 |
Chino | Mortgage Payable - Due February 2021 | East West Bank |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Buildings Securing Loan | item |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |

X
- Definition The period of time defined in the debt instrument in which the reporting entity must discharge final judgments in order to remain in compliance with the loan covenants. + References No definition available. + Details
Name: | amph_DebtInstrumentCovenantPeriodToDischargeFinalJudgment
Namespace Prefix: | amph_
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