|
Credit facilities (Details)
In Millions, unless otherwise specified |
0 Months Ended | 9 Months Ended | 9 Months Ended | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Mar. 15, 2013
Line of Credit [Member]
USD ($)
|
Jun. 30, 2014
Line of Credit [Member]
USD ($)
|
Jun. 30, 2014
Line of Credit [Member]
Base Rate [Member]
|
Jun. 30, 2014
Line of Credit [Member]
Eurocurrency Rate [Member]
|
Jun. 30, 2014
Line of Credit [Member]
Index Rate [Member]
|
Jun. 30, 2014
Line of Credit [Member]
Minimum [Member]
|
Jun. 30, 2014
Line of Credit [Member]
Minimum [Member]
Base Rate [Member]
|
Jun. 30, 2014
Line of Credit [Member]
Minimum [Member]
Eurocurrency Rate [Member]
|
Jun. 30, 2014
Line of Credit [Member]
Minimum [Member]
Index Rate [Member]
|
Jun. 30, 2014
Line of Credit [Member]
Maximum [Member]
Base Rate [Member]
|
Jun. 30, 2014
Line of Credit [Member]
Maximum [Member]
Eurocurrency Rate [Member]
|
Jun. 30, 2014
Line of Credit [Member]
Maximum [Member]
Index Rate [Member]
|
Mar. 15, 2013
Swingline Loans [Member]
USD ($)
|
Jun. 30, 2014
Letter of Credit [Member]
USD ($)
item
|
Mar. 15, 2013
Letter of Credit [Member]
USD ($)
|
Jun. 30, 2014
Letter of Credit [Member]
Minimum [Member]
|
Jun. 30, 2014
Letter of Credit [Member]
Maximum [Member]
|
Jun. 30, 2014
Financial Institution Letter of Credit [Member]
USD ($)
item
|
Jun. 30, 2014
Atlantic Innovation Fund of Canada Loan [Member]
USD ($)
item
|
Jun. 30, 2014
Atlantic Innovation Fund of Canada Loan [Member]
CAD
|
Jun. 30, 2014
Performance Guarantee [Member]
USD ($)
|
|
| Credit facilities | |||||||||||||||||||||
| Term of the credit agreement | 5 years | ||||||||||||||||||||
| Maximum borrowing capacity | $ 100.0 | $ 5.0 | $ 30.0 | 1.8 | |||||||||||||||||
| Number of letters of credit issued | 4 | 2 | |||||||||||||||||||
| Amount borrowed | 15.0 | ||||||||||||||||||||
| Amount repaid | 15.0 | ||||||||||||||||||||
| Amount borrowed | 6.7 | 3.0 | |||||||||||||||||||
| Leverage ratio | 2.5 | ||||||||||||||||||||
| Leverage ratio to calculate annual commitment fee (as a percent) | 0.15% | 0.30% | |||||||||||||||||||
| Variable rate basis | Base Rate | Eurocurrency Rate | Index Rate | ||||||||||||||||||
| Margin (as a percent) | 0.00% | 1.00% | 1.00% | 0.75% | 1.75% | 1.75% | |||||||||||||||
| Interest charges (as a percent) | 0.00% | 0.00% | |||||||||||||||||||
| Number of remaining quarterly installments | 32 | 32 | |||||||||||||||||||
| Amount outstanding | 1.3 | 1.4 | |||||||||||||||||||
| Performance bond commitments | $ 39.3 | ||||||||||||||||||||