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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2012
Operating activities: |  |  |
Net income | $ 10,145 | $ 11,148 | $ 10,553
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation | 1,977 | 1,851 | 1,685
Amortization | 222 | 228 | 339
Amortization of unrecognized prior service cost and actuarial losses | 886 | 893 | 392
Discount accretion on investments | (8) | (15) | (5)
Stock-based compensation expense | 639 | 576 | 611
Loss on disposal or sale of property, plant and equipment | 223 | 85 | 23
Deferred income taxes | (1,011) | (2,357) | 4,413
(Increase) decrease in operating assets: |  |  |
Accounts receivable | (1,001) | 2,264 | (2,844)
Unbilled revenue | 5,318 | (415) | 1,613
Inventories | (5,161) | (5,311) | 2,191
Income taxes receivable/payable | 2,137 | 1,845 | (6,252)
Prepaid expenses and other current and non-current assets | 185 | (300) | (105)
Prepaid pension asset | (793) | (767) | (833)
Increase (decrease) in operating liabilities: |  |  |
Accounts payable | 595 | 2,957 | (3,689)
Accrued compensation, accrued expenses and other current and non-current liabilities | 28 | 59 | 172
Customer deposits | 1,009 | (255) | (5,626)
Long-term portion of accrued compensation, accrued pension liability and accrued postretirement benefits | (160) | (54) | (33)
Net cash provided by operating activities | 15,230 | 12,432 | 2,605
Investing activities: |  |  |
Purchase of property, plant and equipment | (5,263) | (1,655) | (3,243)
Proceeds from disposal of property, plant and equipment | 32 | 37 | 5
Purchase of investments | (109,494) | (83,984) | (32,896)
Redemption of investments at maturity | 108,000 | 73,000 | 39,920
Acquisition of Energy Steel & Supply Co. (See Note 2) |  |  | 384
Net cash ( used) provided by investing activities | (6,725) | (12,602) | 4,170
Financing activities: |  |  |
Principal repayments on capital lease obligations | (88) | (85) | (81)
Issuance of common stock | 581 | 83 | 386
Dividends paid | (1,308) | (899) | (793)
Purchase of treasury stock |  |  | (221)
Excess tax deduction on stock awards | 271 | 43 | 247
Payment of contingent earn-out |  |  | (746)
Net cash used by financing activities | (544) | (858) | (1,208)
Effect of exchange rate changes on cash | (9) | 33 | 57
Net increase (decrease) in cash and cash equivalents | 7,952 | (995) | 5,624
Cash and cash equivalents at beginning of year | 24,194 | 25,189 | 19,565
Cash and cash equivalents at end of year | $ 32,146 | $ 24,194 | $ 25,189

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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition Amount of cash outflow through purchase of long-term held-to-maturity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash inflow associated with the maturity, prepayments and calls (requests for early payments) of debt securities designated as held-to-maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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