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Summary of Significant Accounting Policies (Tables)
 9 Months Ended
Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Components of Deferred Profit
The components of deferred profit are as follows:
 
 
June 30,
2017
 
September 30,
2016
 
(dollars in thousands)
Deferred revenues
$
10,024

 
$
7,029

Deferred costs
4,575

 
2,320

Deferred profit
$
5,449

 
$
4,709
Schedule of Inventory
The components of inventories are as follows:
 
 
June 30,
2017
 
September 30,
2016
 
(dollars in thousands)
Purchased parts and raw materials
$
13,587

 
$
12,435

Work-in-process
6,711

 
7,044

Finished goods
2,888

 
3,744

 
$
23,186

 
$
23,223
Property, Plant and Equipment
The following is a summary of property, plant and equipment:
 
 
June 30,
2017
 
September 30,
2016
 
(dollars in thousands)
Land, building and leasehold improvements
$
18,343

 
$
18,255

Equipment and machinery
8,631

 
9,056

Furniture and fixtures
5,338

 
5,426

 
32,312

 
32,737

Accumulated depreciation and amortization
(17,232
)
 
(16,777
)
 
$
15,080

 
$
15,960
Activity in Goodwill
The following is a summary of activity in goodwill:

 
Solar
 
Semiconductor
 
Polishing
 
Total
 
(dollars in thousands)
   Goodwill
$
6,597

 
$
5,063

 
$
728

 
$
12,388

   Accumulated impairment losses
(1,269
)
 
—

 
—

 
(1,269
)
Carrying value at September 30, 2016
5,328

 
5,063

 
728

 
11,119

Net foreign exchange differences
101

 
—

 
—

 
101

Carrying value at June 30, 2017
$
5,429

 
$
5,063

 
$
728

 
$
11,220

 
 
 
 
 
 
 
 
   Goodwill
$
6,726

 
$
5,063

 
$
728

 
$
12,517

   Accumulated impairment losses
(1,297
)
 
—

 
—

 
(1,297
)
Carrying value at June 30, 2017
$
5,429

 
$
5,063

 
$
728

 
$
11,220
Summary of Intangibles
The following is a summary of intangibles:
 
 
Useful Life
 
Gross Carrying Amount
Accumulated Amortization
Net Carrying Amount
 
Gross Carrying Amount
Accumulated Amortization
Net Carrying Amount
 
 
 
June 30, 2017
 
September 30, 2016
 
 
 
(dollars in thousands)
Customer lists
6-10 years
 
$
2,446

$
(1,406
)
$
1,040

 
$
2,432

$
(1,164
)
$
1,268

Technology
5-10 years
 
3,274

(1,876
)
1,398

 
3,214

(1,678
)
1,536

Trade names
10-15 years
 
1,460

(257
)
1,203

 
1,455

(219
)
1,236

Other
2-10 years
 
283

(281
)
2

 
277

(217
)
60

 
 
 
$
7,463

$
(3,820
)
$
3,643

 
$
7,378

$
(3,278
)
$
4,100
Summary of Activity in Accrued Warranty Expense
The following is a summary of activity in accrued warranty expense:
 
 
Nine Months Ended June 30,
 
2017
 
2016
 
(dollars in thousands)
Beginning balance
$
795

 
$
793

Additions for warranties issued during the period
899

 
691

Reductions for payments made under the warranty
(269
)
 
(624
)
Changes related to pre-existing warranties
(582
)
 
(121
)
Currency translation adjustment
10

 
6

Ending balance
$
853

 
$
745
Stock Option Transactions and Options Outstanding
Stock option transactions and the options outstanding are summarized as follows:
 
 
Nine Months Ended June 30,
 
2017
 
2016
 
Options
 
Weighted
Average
Exercise
Price
 
Options
 
Weighted
Average
Exercise
Price
Outstanding at beginning of period
1,841,567

 
$
8.15

 
1,627,477

 
$
9.11

Granted
145,000

 
5.23

 
350,075

 
5.25

Exercised
(149,301
)
 
5.99

 
(9,846
)
 
3.46

Forfeited
(107,480
)
 
12.68

 
(129,430
)
 
12.87

Outstanding at end of period
1,729,786

 
$
7.82

 
1,838,276

 
$
8.16

 
 
 
 
 
 
 
 
Exercisable at end of period
1,191,876

 
$
8.38

 
1,128,320

 
$
8.91

Weighted average fair value of options
granted during the period
$
3.04

 
 
 
$
3.04

 
 
Options Fair Value Assumptions
The fair value of options was estimated at the applicable grant date using the Black-Scholes option pricing model with the following assumptions:
 
 
Nine Months Ended June 30,
 
2017
 
2016
Risk free interest rate
2%
 
2%
Expected life
6 years
 
6 years
Dividend rate
0%
 
0%
Volatility
63%
 
63%
Restricted Stock Transactions and Awards Outstanding
Restricted stock transactions and awards outstanding are summarized as follows:
 
 
Nine Months Ended June 30,
 
2017
 
2016
 
Awards
 
Weighted
Average
Grant Date
Fair Value
 
Awards
 
Weighted
Average
Grant Date
Fair Value
Beginning Outstanding
—

 
$
—

 
13,540

 
$
7.98

Released
—

 
—

 
(13,540
)
 
7.98

Ending Outstanding
—

 
$
—

 
—

 
$
—
Research and Development Expense and Grants Earned
The table below shows gross research and development expenses and grants earned:
 
 
Three Months Ended
 
Nine Months Ended
 
June 30,
2017
 
June 30,
2016
 
June 30,
2017
 
June 30,
2016
 
(dollars in thousands)
Research, development and engineering
$
1,774

 
$
2,078

 
$
5,547

 
$
7,217

Grants earned
(351
)
 
(510
)
 
(961
)
 
(1,202
)
    Net research, development and engineering
$
1,423

 
$
1,568

 
$
4,586

 
$
6,015