Long-Term Debt and Lines of Credit (Tables)
   | 
9 Months Ended | 
Jun. 30, 2019  | 
| Debt Disclosure [Abstract] | 
 
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| Schedule of long-term debt, net of current portion | 
 
  
The following table summarizes long-term debt and related deferred financing costs, net of accumulated amortization at June 30, 2019 and September 30, 2018:
 
  
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(in thousands)  | 
June 30, 2019  | 
   | 
September 30, 2018  | 
 
   | 
Principal  | 
   | 
Deferred Financing Costs, Net  | 
   | 
Principal  | 
   | 
Deferred Financing Costs, Net  | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Long-term debt, net of current portion:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Met Fixed-Rate Term Loans  | 
$  | 
91,250  | 
 
  | 
   | 
$  | 
752  | 
 
  | 
   | 
$  | 
95,938  | 
 
  | 
   | 
$  | 
836  | 
 
  | 
 
Met Variable-Rate Term Loans  | 
44,563  | 
 
  | 
   | 
346  | 
 
  | 
   | 
46,719  | 
 
  | 
   | 
385  | 
 
  | 
 
Met Citree Term Loan  | 
4,800  | 
 
  | 
   | 
41  | 
 
  | 
   | 
4,925  | 
 
  | 
   | 
44  | 
 
  | 
 
Pru Loans A & B  | 
16,547  | 
 
  | 
   | 
228  | 
 
  | 
   | 
17,417  | 
 
  | 
   | 
241  | 
 
  | 
 
Pru Loan E  | 
4,510  | 
 
  | 
   | 
11  | 
 
  | 
   | 
4,675  | 
 
  | 
   | 
17  | 
 
  | 
 
Pru Loan F  | 
4,510  | 
 
  | 
   | 
38  | 
 
  | 
   | 
4,675  | 
 
  | 
   | 
40  | 
 
  | 
 
   | 
166,180  | 
 
  | 
   | 
1,416  | 
 
  | 
   | 
174,349  | 
 
  | 
   | 
1,563  | 
 
  | 
 
Less current portion  | 
5,325  | 
 
  | 
   | 
—  | 
 
  | 
   | 
5,275  | 
 
  | 
   | 
—  | 
 
  | 
 
Long-term debt  | 
$  | 
160,855  | 
 
  | 
   | 
$  | 
1,416  | 
 
  | 
   | 
$  | 
169,074  | 
 
  | 
   | 
$  | 
1,563  | 
 
  | 
 
  
 
 
 | 
| Schedule of lines of credit | 
 
The following table summarizes lines of credit and related deferred financing costs, net of accumulated amortization at June 30, 2019 and September 30, 2018:
 
  
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   | 
June 30, 2019  | 
   | 
September 30, 2018  | 
 
   | 
Principal  | 
   | 
Deferred Financing Costs, Net  | 
   | 
Principal  | 
   | 
Deferred Financing Costs, Net  | 
 
(in thousands)  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Lines of Credit:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
RLOC  | 
$  | 
—  | 
 
  | 
   | 
$  | 
21  | 
 
  | 
   | 
$  | 
—  | 
 
  | 
   | 
$  | 
58  | 
 
  | 
 
WCLC  | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
2,685  | 
 
  | 
   | 
78  | 
 
  | 
 
Lines of Credit  | 
$  | 
—  | 
 
  | 
   | 
$  | 
21  | 
 
  | 
   | 
$  | 
2,685  | 
 
  | 
   | 
$  | 
136  | 
 
  | 
 
  
 
 
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| Schedule of future maturities of debt and lines of credit | 
 
Future maturities of long-term debt as of June 30, 2019 are as follows:
 
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(in thousands)  | 
   | 
 
   | 
   | 
 
Due within one year  | 
$  | 
5,325  | 
 
  | 
 
Due between one and two years  | 
10,975  | 
 
  | 
 
Due between two and three years  | 
10,975  | 
 
  | 
 
Due between three and four years  | 
14,605  | 
 
  | 
 
Due between four and five years  | 
10,755  | 
 
  | 
 
Due beyond five years  | 
113,545  | 
 
  | 
 
   | 
   | 
 
Total future maturities  | 
$  | 
166,180  | 
 
  | 
 
  
 
 
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| Schedule of interest costs expensed and capitalized | 
 Interest costs expensed and capitalized were as follows: 
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(in thousands)  | 
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   | 
Three Months Ended June 30,  | 
   | 
Nine Months Ended June 30,  | 
 
   | 
2019  | 
   | 
2018  | 
   | 
2019  | 
   | 
2018  | 
 
Interest expense  | 
$  | 
1,745  | 
 
  | 
   | 
$  | 
2,188  | 
 
  | 
   | 
$  | 
5,625  | 
 
  | 
   | 
$  | 
6,682  | 
 
  | 
 
Interest capitalized  | 
269  | 
 
  | 
   | 
166  | 
 
  | 
   | 
714  | 
 
  | 
   | 
447  | 
 
  | 
 
Total  | 
$  | 
2,014  | 
 
  | 
   | 
$  | 
2,354  | 
 
  | 
   | 
$  | 
6,339  | 
 
  | 
   | 
$  | 
7,129  | 
 
  | 
 
  
 
 
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