XML 141 R74.htm IDEA: XBRL DOCUMENT v2.4.1.9
Note 12 - Debt Obligations (Details) - Debt (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Note 12 - Debt Obligations (Details) - Debt [Line Items]    
$ 214,312us-gaap_LongTermDebt $ 206,939us-gaap_LongTermDebt
Less: Current maturity of long-term debt 214,312us-gaap_LongTermDebtCurrent  
Long-term debt, net   206,939us-gaap_LongTermDebtNoncurrent
Convertible Notes 2017 [Member]    
Note 12 - Debt Obligations (Details) - Debt [Line Items]    
Convertible Notes 154,839us-gaap_ConvertibleNotesPayable
/ us-gaap_DebtInstrumentAxis
= bpz_ConvertibleNotes2017Member		 [1] 125,416us-gaap_ConvertibleNotesPayable
/ us-gaap_DebtInstrumentAxis
= bpz_ConvertibleNotes2017Member		 [1]
Convertible Notes 2015 [Member]    
Note 12 - Debt Obligations (Details) - Debt [Line Items]    
Convertible Notes $ 59,473us-gaap_ConvertibleNotesPayable
/ us-gaap_DebtInstrumentAxis
= bpz_ConvertibleNotes2015Member		 [2] $ 81,523us-gaap_ConvertibleNotesPayable
/ us-gaap_DebtInstrumentAxis
= bpz_ConvertibleNotes2015Member		 [2]
[1] The Company estimated the fair value of the 2017 Convertible Notes to be approximately $57.4 million and $130.1 million at December 31, 2014 and December 31, 2013, respectively, based on observed market prices for the same or similar types of debt issues. The fair value of the 2017 Convertible Notes is considered to be a Level 1 measurement on the fair value hierarchy.
[2] The Company estimated the fair value of the 2015 Convertible Notes to be approximately $20.7 million and $79.7 million at December 31, 2014 and December 31, 2013, respectively, based on observed market prices for the same or similar types of debt issues. The fair value of the 2015 Convertible Notes is considered to be a Level 1 measurement on the fair value hierarchy.